diff --git a/B09_Estimation/B09_Estimation_Daega_Personal.py b/B09_Estimation/B09_Estimation_Daega_Personal.py
index 36005a843..73438ccf7 100644
--- a/B09_Estimation/B09_Estimation_Daega_Personal.py
+++ b/B09_Estimation/B09_Estimation_Daega_Personal.py
@@ -30,7 +30,6 @@ from B09_Estimation import B09_Estimation_Bill_Library as library
 from B09_Estimation import B09_Estimation_Sangeun as sg
 from B09_Estimation.B09_Estimation_Calc_Labor import COPY, COVER_KEYS, with_copies
 from B09_Estimation.B09_Estimation_Labor_Source import AREA_FILE, daega_inputs
-from M02_MasterTemplete import M02_Hopyo_Build as hopyo_build
 from M02_MasterTemplete import M02_Item_Prices as item_prices
 from M02_MasterTemplete import M02_Labor_Ref as refs
 from M02_MasterTemplete import M02_MasterTemplete_Store as store
@@ -261,11 +260,11 @@ def _subs(root: Path, lines: list[dict[str, Any]]) -> dict[str, dict[str, Any]]:
 def _carry(lines: list[Any], subs: dict[str, dict[str, Any]], done: dict[str, Any]) -> list[Any]:
     """불러온 하위 참조 → 지금 층 새 키(하위 먼저 · 같은 것 한 번 · 앞서 옮긴 것 = 그 키)."""
     here = refs.here()
-    have = {
-        refs.ref_id(got["복사원본"]): key
-        for key, got, _raw in hopyo_build._origins(store.root())
-        if isinstance(got.get("복사원본"), dict)
-    }
+    have: dict[str, str] = {}  # 733-2 — 실무자료뿐 아니라 모든 사본 원본(`copied_from`)
+    for path in sorted((store.root() / KIND).glob(f"{refs.PREFIX[KIND]}-*.json")):
+        got = refs.copied_from(read_json(path))
+        if got is not None:
+            have.setdefault(refs.ref_id(got), path.stem)
     out = []
     for one in lines:
         ref = one.get("참조") if isinstance(one, dict) else None
@@ -284,8 +283,32 @@ def _carry(lines: list[Any], subs: dict[str, dict[str, Any]], done: dict[str, An
     return out
 
 
-def write(doc: dict[str, Any], overwrite: str | None = None) -> dict[str, Any]:
-    """지금 층(`store.at` 안)에 씀 — 같은 이름이면 409 · `overwrite` = 같은 이름 그 키를 덮음."""
+def _ask(kind: str, doc: dict[str, Any], subs: dict, new: bool, use: str | None) -> str | None:
+    """같은 층 같은 내용(733-2 · `M02_Library_Ask`) — 하위 호표(층 밖 참조) 지문은 굳힌 문서로."""
+    from M02_MasterTemplete import M02_Library_Ask as ask
+    from M02_MasterTemplete.M02_Library_Same import Same
+
+    s = Same()
+
+    def fill(rid: str) -> None:
+        if rid in s.memo or rid not in subs:
+            return
+        sub = {k: v for k, v in subs[rid].items() if k not in ("키", "알약")}
+        for ref in _own(sub.get("담은로직")):
+            fill(refs.ref_id(ref))
+        s.memo[rid] = s.finger(KIND, sub) or f"없음:{rid}"
+
+    for rid in subs:
+        fill(rid)
+    return ask.ask(kind, doc, new, use, s)
+
+
+def write(
+    doc: dict[str, Any], overwrite: str | None = None, new: bool = False, use: str | None = None
+) -> dict[str, Any]:
+    """지금 층(`store.at` 안)에 씀 — 같은 이름이면 409 · `overwrite` = 같은 이름 그 키를 덮음 ·
+    같은 내용(733-2) = 409 `{같은것, 까닭}`(같은 이름도 있으면 `같은이름 · 이름` 함께) →
+    `new` 그래도 새로 · `use` 그 키(새로 안 만듦 · 답 `씀`)."""
     subs = doc.get(SUBS) or {}
     doc = {k: v for k, v in doc.items() if k != SUBS}
     kind = SK_KIND if doc.get("종류") == refs.TITLE[SK_KIND] else KIND
@@ -296,8 +319,16 @@ def write(doc: dict[str, Any], overwrite: str | None = None) -> dict[str, Any]:
     ]
     if overwrite and overwrite not in same:
         raise store.StoreError(409, f"덮어쓸 「{doc['이름']}」 이 없음 — 다시 누름")
-    if same and not overwrite:
-        raise store.StoreError(409, {"같은이름": same[0], "이름": doc["이름"]})
+    if not overwrite:
+        named = {"같은이름": same[0], "이름": doc["이름"]} if same else {}
+        try:
+            got = _ask(kind, doc, subs, new, use)
+        except store.StoreError as e:
+            raise store.StoreError(e.status, {**e.detail, **named}) from e
+        if got:
+            return {"이름": got, "씀": True}
+        if same:
+            raise store.StoreError(409, named)
     if subs:
         doc = {**doc, "담은로직": _carry(doc["담은로직"], subs, {})}
     if overwrite:
diff --git a/B09_Estimation/B09_Estimation_Router.py b/B09_Estimation/B09_Estimation_Router.py
index f1da8d317..abc2306a0 100644
--- a/B09_Estimation/B09_Estimation_Router.py
+++ b/B09_Estimation/B09_Estimation_Router.py
@@ -511,6 +511,8 @@ class PersonalBody(BaseModel):
     name: str | None = Field(None, max_length=200)
     overwrite: str | None = Field(None, max_length=20)
     user: dict[str, Any] | None = None
+    새로: bool = False  # 같은 내용 409 뒤 — 그래도 새로(733-2)
+    씀: str | None = Field(None, max_length=20)  # 같은 내용 409 뒤 — 그 키 씀
 
 
 @router.post("/{project_id}/estimation/daega/personal")
@@ -529,7 +531,8 @@ async def save_personal(
     if not made["문서"]["이름"]:
         raise HTTPException(status_code=400, detail="이름이 빔")
     folder = await asyncio.to_thread(_root, session, "personal", None, True)
-    got = await asyncio.to_thread(_call, folder, personal.write, made["문서"], body.overwrite)
+    args = (made["문서"], body.overwrite, body.새로, body.씀)
+    got = await asyncio.to_thread(_call, folder, personal.write, *args)
     return {
         "키": got["이름"],
         "이름": made["문서"]["이름"],
diff --git a/M02_MasterTemplete/M02_Hopyo_Item.py b/M02_MasterTemplete/M02_Hopyo_Item.py
index dec7e4710..f1b0fb1cf 100644
--- a/M02_MasterTemplete/M02_Hopyo_Item.py
+++ b/M02_MasterTemplete/M02_Hopyo_Item.py
@@ -18,6 +18,7 @@ from M02_MasterTemplete import M02_Hopyo_Build as hb
 from M02_MasterTemplete import M02_Hopyo_Store as hopyo_store
 from M02_MasterTemplete import M02_Item_Personal as personal
 from M02_MasterTemplete import M02_Labor_Spec as spec
+from M02_MasterTemplete import M02_Library_Ask as ask
 from M02_MasterTemplete import M02_MasterTemplete_Store as store
 
 PATH = ["실무자료"]
@@ -96,8 +97,12 @@ def make_item(
     bundle: list[int] | None = None,
     name: str | None = None,
     who: Any = None,
+    new: bool = False,
+    use: str | None = None,
 ) -> dict[str, Any]:
-    """[구조물 조합으로] → `{key, 열, 이름, 줄수, 열수, 빠진줄}` — `bundle` = 규격 열로 묶을 호표 번(연 호표 빼고)."""
+    """[구조물 조합으로] → `{key, 열, 이름, 줄수, 열수, 빠진줄}` —
+    `bundle` = 규격 열로 묶을 호표 번(연 호표 빼고) ·
+    이 층 같은 내용 항목 = 409(733-2) → `new` 그래도 새로 · `use` 그 항목(`씀` · 새로 안 만듦)."""
     main = _doc(folder, source, key, no, lines, whole, who)
     doc, hopyo = main["문서"], main["호표"]
     title = (name or "").strip() or doc["이름"]
@@ -130,6 +135,14 @@ def make_item(
             "기본": found[int(no)]["열"],
             "수량": qty,
         }
+    count = {
+        "줄수": len(doc["담은로직"]) + len(doc["자재"]),
+        "열수": len(cols_doc["열"]) if cols_doc else 1,
+    }
+    want = {"담은로직": doc["담은로직"], "자재": doc["자재"], "단위": doc.get("단위")}
+    reuse = ask.ask_item(folder, {**want, "규격": cols_doc}, new, use)
+    if reuse:
+        return {**reuse, **count, "빠진줄": main["빠진줄"]}
     with store.at(folder):
         made = personal.create_item(folder, PATH, title, doc.get("단위"))
         have = store.read("labor", made["열"])
@@ -138,8 +151,4 @@ def make_item(
         if cols_doc:
             body["규격"] = cols_doc
         store.write("labor", made["열"], have["판"], body)
-    count = {
-        "줄수": len(doc["담은로직"]) + len(doc["자재"]),
-        "열수": len(cols_doc["열"]) if cols_doc else 1,
-    }
     return {**made, **count, "빠진줄": main["빠진줄"]}
diff --git a/M02_MasterTemplete/M02_Labor_Ref.py b/M02_MasterTemplete/M02_Labor_Ref.py
index ad09e464e..3490e859b 100644
--- a/M02_MasterTemplete/M02_Labor_Ref.py
+++ b/M02_MasterTemplete/M02_Labor_Ref.py
@@ -383,9 +383,30 @@ def origin_mark(doc: dict[str, Any], ref: Ref) -> dict[str, Any]:
     return {**doc, "본뜬": ref}
 
 
+def copied_from(doc: Any) -> Ref | None:
+    """복사 문서의 원본 참조(`origin_mark` 거꾸로) — 실무자료 본뜬 = `복사원본` · 그 밖 = `본뜬`."""
+    own = doc.get("본뜬") if isinstance(doc, dict) else None
+    if isinstance(own, dict) and own.get("층") == "실무자료":
+        own = own.get("복사원본")
+    return own if isinstance(own, dict) and own.get("키") else None
+
+
+def _reused(kind: str, doc: dict[str, Any], ref: Ref) -> str | None:
+    """지금 층에 같은 원본(`ref`) 본뜬 같은 내용 사본이 있으면 그 키(733-2 · 다시 복사 = 재사용)."""
+    from M02_MasterTemplete.M02_Library_Same import Same
+
+    rid = ref_id(ref)
+    for key in Same().find_same(store.root(), kind, doc):
+        got = copied_from(read_ref({"층": here()[0], "주인": here()[1], "키": key}))
+        if got is not None and ref_id(got) == rid:
+            return key
+    return None
+
+
 def carry(doc: dict[str, Any], source: Here) -> dict[str, Any]:
     """복사(원본 층 `source` → 지금 층) — 지금 층이 못 읽는 참조는 그 문서를 지금 층에 새 키로
-    같이 복사(`본뜬` = 원래 참조) · 참조를 새 키로 바꿈. 원본 층 읽기 권한은 부르는 쪽 몫."""
+    같이 복사(`본뜬` = 원래 참조) · 참조를 새 키로 바꿈 · 같은 원본 같은 내용 사본이 이미 있으면
+    그 키(733-2). 원본 층 읽기 권한은 부르는 쪽 몫."""
     target, done = here(), {}
 
     def move(ref: Ref, depth: int) -> Ref:
@@ -398,9 +419,10 @@ def carry(doc: dict[str, Any], source: Here) -> dict[str, Any]:
         got = read_ref(ref)
         if got is None:
             raise _bad(f"없는 참조 「{ref['키']}」")
-        body = _move_doc(got, move, depth + 1)
-        made = create(kind_of(ref["키"]), origin_mark(_spec_moved(body, done), ref))
-        done[ref_id(ref)] = {"층": target[0], "주인": target[1], "키": made["이름"]}
+        body = origin_mark(_spec_moved(_move_doc(got, move, depth + 1), done), ref)
+        kind = kind_of(ref["키"])
+        key = _reused(kind, body, ref) or create(kind, body)["이름"]
+        done[ref_id(ref)] = {"층": target[0], "주인": target[1], "키": key}
         return done[ref_id(ref)]
 
     return _spec_moved(_move_doc(doc, move, 1), done)
diff --git a/M02_MasterTemplete/M02_Labor_Router.py b/M02_MasterTemplete/M02_Labor_Router.py
index a0951097d..a5b4ec424 100644
--- a/M02_MasterTemplete/M02_Labor_Router.py
+++ b/M02_MasterTemplete/M02_Labor_Router.py
@@ -38,6 +38,7 @@ from M02_MasterTemplete import M02_Hopyo_Store as hopyo_store
 from M02_MasterTemplete import M02_Labor_Doc as labor
 from M02_MasterTemplete import M02_Labor_Ref as refs
 from M02_MasterTemplete import M02_Layer_Access as access
+from M02_MasterTemplete import M02_Library_Ask as library_ask
 from M02_MasterTemplete import M02_MasterTemplete_Store as store
 from M02_MasterTemplete import M02_Material_Own as own
 from M02_MasterTemplete import M02_Precombo_Folders as pre_folders
@@ -100,10 +101,13 @@ def labor_pills(
 
 
 class LibraryBody(BaseModel):
-    """새로 = `문서` · 복사 = `본뜬` {층, 주인, 키}(원본 읽기 권한 · 못 읽는 참조는 같이 복사)."""
+    """새로 = `문서` · 복사 = `본뜬` {층, 주인, 키}(원본 읽기 권한 · 못 읽는 참조는 같이 복사) ·
+    새로 같은 내용 409 → `새로` = 그래도 새로 · `씀` = 그 키(733-2 · `M02_Library_Ask`)."""
 
     문서: dict[str, Any] | None = None
     본뜬: dict[str, Any] | None = None
+    새로: bool = False
+    씀: str | None = None
 
 
 def _copy(kind: str, doc: dict[str, Any], source: refs.Here, ref: dict) -> dict[str, Any]:
@@ -121,7 +125,7 @@ def new_library(
     """서고 새로 · 복사 — 키는 서버가 그 층 다음 번호(SP · SC) · 답 `이름` = 새 키."""
     folder = _root(session, layer, owner, write=True)
     if body.본뜬 is None:
-        return _call(folder, refs.create, kind, body.문서 or {})
+        return _call(folder, library_ask.create, kind, body.문서 or {}, body.새로, body.씀)
     src = body.본뜬
     if src.get("층") not in ("system", "company", "personal"):
         raise HTTPException(status_code=400, detail="본뜬 층이 틀림")
@@ -623,6 +627,8 @@ class ItemBody(BuildBody):
 
     묶음: list[int] = Field(default_factory=list, max_length=20)
     이름: str | None = Field(None, max_length=120)
+    새로: bool = False  # 같은 내용 항목 409 뒤 — 그래도 새로(733-2)
+    씀: str | None = Field(None, max_length=80)  # 같은 내용 409 뒤 — 그 항목 씀
 
 
 @router.post("/layers/{layer}/hopyo-item")
@@ -639,4 +645,5 @@ def hopyo_to_item(
     lines = [one.model_dump(exclude_none=True) for one in body.줄]
     whole = body.통째.model_dump(exclude_none=True) if body.통째 else None
     args = (folder, source, body.키, body.번, lines, whole, body.묶음, body.이름, _who(session))
+    args += (body.새로, body.씀)
     return _call(folder, hopyo_item.make_item, *args)
diff --git a/M02_MasterTemplete/M02_Library_Ask.py b/M02_MasterTemplete/M02_Library_Ask.py
new file mode 100644
index 000000000..ff3796196
--- /dev/null
+++ b/M02_MasterTemplete/M02_Library_Ask.py
@@ -0,0 +1,123 @@
+"""사람 길 만들 때 물음(PLAN 733-2 · 요구서_572 3장 3) — 같은 층 같은 내용 문서가 있으면 409.
+
+409 detail = `{같은것: [{키, 이름, 층, 주인}], 까닭}` → 다시 보냄 몸 `새로: true` = 그래도 새로 ·
+`씀: <키>` = 그것을 씀(새로 안 만듦 · 그 키를 돌려줌 · 같은 내용이 아니면 다시 409).
+지문 = `M02_Library_Same`(일위대가 SC · 단가산출 SK) · 구조물 조합(labor) = 같은 꼴 + 줄 수량 넣음.
+빈 문서(지문 없음) = 안 물음 · 같은 층 [복사] · 붙여넣기 = 안 물음(복사가 뜻).
+부르는 쪽 = 지금 층(`store.at` 안).
+"""
+
+from __future__ import annotations
+
+import json
+from pathlib import Path
+from typing import Any
+
+from common_util.common_util_derived_store import derived_key
+from M02_MasterTemplete import M02_Labor_Ref as refs
+from M02_MasterTemplete import M02_Library_Same as same
+from M02_MasterTemplete import M02_MasterTemplete_Store as store
+from M02_MasterTemplete import M02_MasterTemplete_Tree as tree
+
+WHY = "같은 층에 같은 내용 문서가 있음 — 그것을 씀 · 그래도 새로"
+
+
+def _cleaned(kind: str, doc: dict[str, Any]) -> dict[str, Any]:
+    """저장될 꼴로 견줌(서버 정리) — 틀린 문서는 그대로(만들 때 까닭이 남)."""
+    try:
+        return refs.clean_doc(kind, {**doc, "키": refs.next_key(kind)})
+    except store.StoreError:
+        return doc
+
+
+def _refuse(rows: list[dict[str, Any]], why: str = WHY) -> store.StoreError:
+    return store.StoreError(409, {"같은것": rows, "까닭": why})
+
+
+def _pick(found: list[str], rows: list[dict[str, Any]], new: bool, use: str | None) -> str | None:
+    if use:
+        if use in found:
+            return use
+        raise _refuse(rows, f"고른 「{use}」 가 같은 내용이 아님 — 다시 고름")
+    if found and not new:
+        raise _refuse(rows)
+    return None
+
+
+def ask(
+    kind: str,
+    doc: dict[str, Any],
+    new: bool = False,
+    use: str | None = None,
+    s: same.Same | None = None,
+) -> str | None:
+    """서고 문서(SC · SK) — 씀 키 | None(새로 만듦) · 같은 것 있고 물음 없으면 409 ·
+    `s` = 미리 채운 지문 한 벌(층 밖 참조 지문 등)."""
+    folder = store.root()
+    found = (s or same.Same()).find_same(folder, kind, _cleaned(kind, doc))
+    at = refs.where(folder)
+    rows = [
+        {
+            "키": key,
+            "이름": (refs.read_ref({"층": at[0], "주인": at[1], "키": key}) or {}).get("이름"),
+        }
+        for key in found
+    ]
+    return _pick(found, [{**r, "층": at[0], "주인": at[1]} for r in rows], new, use)
+
+
+def labor_finger(doc: Any) -> str | None:
+    """구조물 조합 일위대가 지문 — 담은로직 · 자재 · 단위 · 규격(줄 수량 넣음 · 차례 무시)."""
+    if not isinstance(doc, dict):
+        return None
+    s = same.Same()
+    mats = [same.norm(m) for m in doc.get("자재") or []]
+    body = {
+        "단위": same.unit(doc.get("단위")),
+        "담은로직": same._sorted([s._line(x, (), True) for x in doc.get("담은로직") or []]),
+        "자재": same._sorted(mats),
+        "규격": same.norm(doc.get("규격")),
+    }
+    body = {k: v for k, v in body.items() if v not in same.EMPTY}
+    if not body.get("담은로직") and not body.get("자재"):
+        return None
+    return f"SU:{derived_key(body)}"
+
+
+def ask_item(
+    folder: Path, doc: dict[str, Any], new: bool = False, use: str | None = None
+) -> dict[str, Any] | None:
+    """구조물 조합 항목(실무 호표 [구조물 조합으로]) — 씀 = `{key, 열, 이름}` | None(새로) · 409."""
+    from M02_MasterTemplete import M02_Labor_Doc as labor
+
+    try:
+        doc = {**labor.clean(doc), "규격": doc.get("규격")}  # 저장될 꼴로 견줌
+    except store.StoreError:
+        pass
+    want = labor_finger(doc)
+    if not want:
+        return None
+    at = refs.where(folder)
+    with store.at(folder):
+        table = store.read("table", store.STRUCTURE_TABLE)["문서"]
+    cols = {c["id"]: c for c in table.get("열") or [] if tree.is_item(c)}
+    found, rows = [], []
+    for key, col in cols.items():
+        try:
+            have = json.loads((Path(folder) / "labor" / f"{key}.json").read_bytes())
+        except (OSError, ValueError):
+            continue
+        if labor_finger(have) == want:
+            name = " / ".join(tree.path_of(col))
+            found.append(key)
+            rows.append({"키": key, "이름": name, "층": at[0], "주인": at[1]})
+    got = _pick(found, rows, new, use)
+    if got is None:
+        return None
+    return {"key": got, "열": got, "이름": rows[found.index(got)]["이름"], "씀": True}
+
+
+def create(kind: str, doc: dict[str, Any], new: bool = False, use: str | None = None) -> dict:
+    """[새로 만들기](733-2) — 같은 것 물음 뒤 `refs.create` · 씀 = `{이름: 그 키, 씀: true}`."""
+    got = ask(kind, doc, new, use)
+    return {"이름": got, "씀": True} if got else refs.create(kind, doc)
diff --git a/M02_MasterTemplete/M02_Sangeun_Calc.py b/M02_MasterTemplete/M02_Sangeun_Calc.py
index d46b8f5c4..307d5205f 100644
--- a/M02_MasterTemplete/M02_Sangeun_Calc.py
+++ b/M02_MasterTemplete/M02_Sangeun_Calc.py
@@ -481,19 +481,23 @@ def calc_doc(doc: Any, given: dict | None = None) -> dict[str, Any]:
     return labor._json({**per_unit(got, clean), "머리": head_of(clean)})
 
 
-def from_line(line: Any, name: str, unit: str) -> dict[str, Any]:
+def from_line(
+    line: Any, name: str, unit: str, new: bool = False, use: str | None = None
+) -> dict[str, Any]:
     """[단가산출로 저장](715-3) — 일위대가 줄(바탕 · 입력값 · 고름 · 줄 덮개) → 지금 층 새 SK ·
-    답 = `{이름: 새 키, 줄: 그 SK 참조 줄}`(일위대가 문서는 화면 [저장] 때 바뀜)."""
+    답 = `{이름: 새 키, 줄: 그 SK 참조 줄}`(일위대가 문서는 화면 [저장] 때 바뀜) ·
+    같은 층 같은 내용 SK = 409(733-2) → `new` 그래도 새로 · `use` 그 SK(새로 안 만듦)."""
     from M01_MasterData import M01_MasterData_Store as m01
     from M02_MasterTemplete import M02_Labor_Patch as patch
+    from M02_MasterTemplete import M02_Library_Ask as ask
 
     if not isinstance(line, dict):
         raise store.StoreError(400, "줄이 묶음 아님")
     doc = patch.to_sangeun(line, name, unit, m01.loaded()[1])
-    made = refs.create(sd.KIND, doc)
+    key = ask.ask(sd.KIND, doc, new, use) or refs.create(sd.KIND, doc)["이름"]
     at = refs.here()
     keep = {k: line[k] for k in ("별칭", "메모", "수량") if k in line}
     return {
-        "이름": made["이름"],
-        "줄": {"참조": {"층": at[0], "주인": at[1], "키": made["이름"]}, **keep},
+        "이름": key,
+        "줄": {"참조": {"층": at[0], "주인": at[1], "키": key}, **keep},
     }
diff --git a/M02_MasterTemplete/M02_Sangeun_Router.py b/M02_MasterTemplete/M02_Sangeun_Router.py
index 72d0a415e..c2c3769a0 100644
--- a/M02_MasterTemplete/M02_Sangeun_Router.py
+++ b/M02_MasterTemplete/M02_Sangeun_Router.py
@@ -42,6 +42,8 @@ class FromLineBody(BaseModel):
     줄: dict[str, Any]
     이름: str
     단위: str
+    새로: bool = False  # 같은 내용 409 뒤 — 그래도 새로(733-2)
+    씀: str | None = None  # 같은 내용 409 뒤 — 그 SK 씀
 
 
 @router.post("/layers/{layer}/sangeun/from-line")
@@ -53,7 +55,7 @@ def sangeun_from_line(
 ) -> dict:
     """[단가산출로 저장](715-3) — 일위대가 줄 → 그 층 새 단가산출 · 답 = 새 키 + 바꿀 참조 줄."""
     folder = _root(session, layer, owner, write=True)
-    return _call(folder, calc.from_line, body.줄, body.이름, body.단위)
+    return _call(folder, calc.from_line, body.줄, body.이름, body.단위, body.새로, body.씀)
 
 
 @router.post("/layers/{layer}/sangeun/calc")
diff --git a/M02_MasterTemplete/M02_Share_Request.py b/M02_MasterTemplete/M02_Share_Request.py
index d2ce53c8f..1d078f0c5 100644
--- a/M02_MasterTemplete/M02_Share_Request.py
+++ b/M02_MasterTemplete/M02_Share_Request.py
@@ -29,6 +29,7 @@ from common_util.common_util_json import atomic_write_json
 from M02_MasterTemplete import M02_Item_Paste as paste_store
 from M02_MasterTemplete import M02_Labor_Ref as refs
 from M02_MasterTemplete import M02_Layer_Access as access
+from M02_MasterTemplete import M02_Library_Ask as library_ask
 from M02_MasterTemplete import M02_MasterTemplete_Items as items_store
 from M02_MasterTemplete import M02_MasterTemplete_Store as store
 from M02_MasterTemplete import M02_Precombo_Folders as pre_folders
@@ -54,6 +55,8 @@ class AskBody(BaseModel):
 
 class ApproveBody(BaseModel):
     경로: list[str] = []
+    새로: bool = False  # 회사 층 같은 내용 409 뒤 — 그래도 새로(733-2 · 일위대가)
+    씀: str | None = None  # 같은 내용 409 뒤 — 그 회사 문서를 사본으로(새로 안 만듦)
 
 
 class RejectBody(BaseModel):
@@ -171,9 +174,9 @@ def _settle(session: Session, company: str | None, rid: str, done: dict[str, Any
     return row
 
 
-def _copy(session: Session, dest: list[str]):
+def _copy(session: Session, dest: list[str], new: bool = False, use: str | None = None):
     """승인 = 「회사로 복사…」와 같은 길 — 구조물 항목 = 붙여넣기 ·
-    사전조합 = 서고 복사(+ 폴더 자리)."""
+    사전조합 = 서고 복사(+ 폴더 자리) · 회사 층 같은 내용 = 409 물음(733-2 · `M02_Library_Ask`)."""
 
     def run(row: dict[str, Any], company: str) -> str:
         target = _root(session, "company", company, write=True)
@@ -194,11 +197,14 @@ def _copy(session: Session, dest: list[str]):
         def make() -> dict[
             str, Any
         ]:  # 못 읽는 참조 같이 복사 = 받는 층 안에서(`new_library` 와 같음)
+            got = library_ask.ask("precombo", doc, new, use)  # 참조 지문 = 내용 → 옮기기 전 견줌
+            if got:
+                return {"이름": got, "씀": True}
             return refs.create("precombo", refs.carry(refs.origin_mark(doc, ref), here))
 
         here = ("personal", row["주인"])
         made = _call(target, make)
-        if dest:
+        if dest and not made.get("씀"):
             view = _call(target, pre_folders.view)
             move = {"op": "move", "키": made["이름"], "새경로": dest, "판": view["판"]}
             _call(target, pre_folders.edit, move)
@@ -215,7 +221,8 @@ def approve(
     session: Session = Depends(verify_session),
 ) -> dict[str, Any]:
     """승인 — 회사 층 `경로` 폴더에 사본(새 키 · 같은 이름 「(1)」) · 원본 개인 것은 그대로."""
-    return _settle(session, company, rid, {"상태": "승인", "run": _copy(session, body.경로)})
+    run = _copy(session, body.경로, body.새로, body.씀)
+    return _settle(session, company, rid, {"상태": "승인", "run": run})
 
 
 @router.post("/share-requests/{rid}/reject")
diff --git a/resources/tester/test_703_b09_daega_copy.py b/resources/tester/test_703_b09_daega_copy.py
index 94d823351..c29381245 100644
--- a/resources/tester/test_703_b09_daega_copy.py
+++ b/resources/tester/test_703_b09_daega_copy.py
@@ -174,7 +174,14 @@ def test_자료집_같은_이름_물음(world):
         changed["담은로직"][1]["수량"] = {"손": 9}
         again = personal.write(changed, first["이름"])  # 덮어쓰기
         assert again["이름"] == first["이름"]
-        other = personal.write({**doc, "이름": "내 돌붙임 2"})  # 새 이름
+        with pytest.raises(m02.StoreError) as e:  # 733-2 — 새 이름이라도 같은 내용 = 409 물음
+            personal.write({**doc, "이름": "내 돌붙임 2"})
+        assert (
+            e.value.detail["같은것"][0]["키"] == first["이름"] and "같은이름" not in e.value.detail
+        )
+        other = personal.write({**doc, "이름": "내 돌붙임 2"}, new=True)  # 그래도 새로
+        used = personal.write({**doc, "이름": "내 돌붙임 3"}, use=first["이름"])  # 그것을 씀
+        assert used == {"이름": first["이름"], "씀": True}
         assert other["이름"] != first["이름"]
     saved = json.loads(
         (world["folder"] / "precombo" / f"{first['이름']}.json").read_text(encoding="utf-8")
diff --git a/resources/tester/test_705_2_hopyo_paste.py b/resources/tester/test_705_2_hopyo_paste.py
index 69535a43e..62cacc2b0 100644
--- a/resources/tester/test_705_2_hopyo_paste.py
+++ b/resources/tester/test_705_2_hopyo_paste.py
@@ -359,6 +359,22 @@ def test_구조물_조합으로_남의_층_403(client):
     assert client.post("/api/m02/layers/company/hopyo-item", json=body).status_code == 403
 
 
+def test_구조물_조합으로_같은_내용_409_씀_새로(client):
+    """733-2 — 이 층 같은 내용 항목 = 409 `{같은것}` → `씀` = 새 항목 0 · `새로` = 새 항목 1."""
+    key = _upload(client, "대흥")
+    url, body = "/api/m02/layers/personal/hopyo-item", {"층": "personal", "키": key, "번": 17}
+    first = client.post(url, json=body).json()
+    count = len(list((layers_dir() / "labor").glob("*.json")))
+    res = client.post(url, json=body)
+    assert res.status_code == 409 and res.json()["detail"]["같은것"][0]["키"] == first["열"]
+    used = client.post(url, json={**body, "씀": first["열"]}).json()
+    assert used["열"] == first["열"] and used["씀"] is True
+    assert len(list((layers_dir() / "labor").glob("*.json"))) == count
+    made = client.post(url, json={**body, "새로": True}).json()
+    assert made["열"] != first["열"]
+    assert len(list((layers_dir() / "labor").glob("*.json"))) == count + 1
+
+
 def test_규격_열_이름():
     from M02_MasterTemplete import M02_Hopyo_Item as item
 
diff --git a/resources/tester/test_733_2_library_ask.py b/resources/tester/test_733_2_library_ask.py
new file mode 100644
index 000000000..1b891f2d0
--- /dev/null
+++ b/resources/tester/test_733_2_library_ask.py
@@ -0,0 +1,115 @@
+"""사람 길 만들 때 물음(PLAN 733-2 · `M02_Library_Ask`) — 임시 storage.
+
+같은 층 같은 내용 = 409 `{같은것: [{키, 이름, 층, 주인}], 까닭}` →
+`씀` = 새 문서 0 · `새로` = 새 문서 1.
+길 = 새로 만들기 · [단가산출로 저장] from-line · 공유 요청 승인 · 복사 딸림 재사용(carry) ·
+빈 문서 · 같은 층 복사 = 안 물음. B09 내 자료집 = `test_703_b09_daega_copy` · 구조물 조합으로 =
+`test_705_2_hopyo_paste`.
+"""
+
+from __future__ import annotations
+
+import pytest
+
+from M02_MasterTemplete import M02_Labor_Ref as refs
+from M02_MasterTemplete import M02_MasterTemplete_Store as store
+from M02_MasterTemplete import M02_Sangeun_Calc as calc
+from M02_MasterTemplete import M02_Template_Layers as layers
+from resources.tester import test_706_1_share_request as share_t
+from resources.tester.test_706_1_share_request import URL, _as, _client
+
+world = share_t.world  # 같은 임시 storage 판
+
+TEN = "GC000421"
+STONE = "GF000219"
+LIB = "/api/m02/layers/{}/library/{}"
+
+
+def _count(folder, kind="precombo") -> int:
+    return len(list((folder / kind).glob("S?-*.json")))
+
+
+def _doc(name: str, code: str = TEN) -> dict:
+    return {"문서": {"이름": name, "단위": "㎡", "담은로직": [{"로직": code}]}}
+
+
+def test_새로_만들기_같은_내용_409_씀_새로(world):
+    client = _client(world)
+    _as(world)
+    mine = layers.personal_dir(7, 42)
+    url = LIB.format("personal", "precombo")
+    first = client.post(url, json=_doc("가")).json()["이름"]
+    res = client.post(url, json=_doc("이름 다름"))  # 이름이 달라도 같은 내용
+    assert res.status_code == 409, res.text
+    detail = res.json()["detail"]
+    assert detail["같은것"] == [{"키": first, "이름": "가", "층": "personal", "주인": "7/42"}]
+    assert detail["까닭"]
+    used = client.post(url, json={**_doc("이름 다름"), "씀": first}).json()
+    assert used == {"이름": first, "씀": True} and _count(mine) == 1  # 그것을 씀 = 새 0
+    made = client.post(url, json={**_doc("이름 다름"), "새로": True}).json()["이름"]
+    assert made != first and _count(mine) == 2  # 그래도 새로 = 새 1
+    bad = client.post(url, json={**_doc("다른 것", STONE), "씀": first})
+    assert bad.status_code == 409 and _count(mine) == 2  # 같은 내용 아닌 키 = 다시 물음
+    assert client.post(url, json=_doc("다른 것", STONE)).status_code == 200  # 다른 내용 = 그대로
+    for _ in range(2):  # 빈 새 문서 = 지문 없음 · 안 물음
+        empty = client.post(url, json={"문서": {"이름": "빈", "담은로직": []}})
+        assert empty.status_code == 200, empty.text
+    copy = {"본뜬": {"층": "personal", "주인": "7/42", "키": first}}
+    assert client.post(url, json=copy).status_code == 200  # 같은 층 [복사] = 안 물음
+
+
+def test_단가산출로_저장_같은_내용_409_씀_새로(world):
+    mine = layers.personal_dir(7, 42)
+    line = {"로직": TEN, "수량": {"손": 2}, "별칭": "내 줄"}
+    with store.at(mine):
+        first = calc.from_line(line, "줄로 만든", "㎡")
+        with pytest.raises(store.StoreError) as e:
+            calc.from_line(line, "또 만든", "㎡")
+        assert e.value.status == 409 and e.value.detail["같은것"][0]["키"] == first["이름"]
+        used = calc.from_line(line, "또 만든", "㎡", use=first["이름"])
+        assert used == first and _count(mine, "sangeun") == 1  # 줄 = 그 SK 참조
+        made = calc.from_line(line, "또 만든", "㎡", new=True)
+    assert made["이름"] != first["이름"] and _count(mine, "sangeun") == 2
+
+
+def test_공유_승인_회사_같은_내용_409_씀_새로(world):
+    client = _client(world)
+    _as(world)
+    pre = client.post(LIB.format("personal", "precombo"), json=_doc("내 것")).json()["이름"]
+    rid = client.post(URL, json={"종류": "precombo", "키": pre}).json()["id"]
+    _as(world, "ADMIN", user=50)
+    company = layers.company_dir(7)
+    have = client.post(LIB.format("company", "precombo"), json=_doc("회사 것")).json()["이름"]
+    res = client.post(f"{URL}/{rid}/approve", json={"경로": []})
+    assert res.status_code == 409 and res.json()["detail"]["같은것"][0]["키"] == have
+    assert client.get(URL).json()["줄"][0]["상태"] == "요청"  # 물음 뒤 그대로
+    ok = client.post(f"{URL}/{rid}/approve", json={"경로": [], "씀": have}).json()
+    assert ok["상태"] == "승인" and ok["사본"] == have and _count(company) == 1
+    _as(world)
+    rid = client.post(URL, json={"종류": "precombo", "키": pre}).json()["id"]
+    _as(world, "ADMIN", user=50)
+    ok = client.post(f"{URL}/{rid}/approve", json={"경로": [], "새로": True}).json()
+    assert ok["사본"] != have and _count(company) == 2
+
+
+def test_복사_딸림_같은_원본_재사용(world):
+    client = _client(world)
+    _as(world)
+    mine = layers.personal_dir(7, 42)
+    url = LIB.format("personal", "precombo")
+    inner = client.post(url, json=_doc("안")).json()["이름"]
+    ref = {"층": "personal", "주인": "7/42", "키": inner}
+    outer = {"문서": {"이름": "밖", "단위": "㎡", "담은로직": [{"참조": ref}]}}
+    top = client.post(url, json=outer).json()["이름"]
+    with store.at(mine):
+        doc = store.read("precombo", top)["문서"]
+    src = {"층": "personal", "주인": "7/42", "키": top}
+    company = layers.company_dir(7)
+    with store.at(company):
+        one = refs.create("precombo", refs.carry(refs.origin_mark(doc, src), ("personal", "7/42")))
+        assert _count(company) == 2  # 밖 + 딸린 안
+        two = refs.create("precombo", refs.carry(refs.origin_mark(doc, src), ("personal", "7/42")))
+    assert _count(company) == 3  # 다시 복사 = 밖만 새로 · 딸린 안 = 앞 사본 재사용
+    with store.at(company):
+        got = [store.read("precombo", m["이름"])["문서"]["담은로직"][0]["참조"] for m in (one, two)]
+    assert got[0] == got[1] and got[0]["층"] == "company"