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| 骶管 (纵贯骶骨全长，横断面呈三角形，借两侧的椎间孔与骶前孔和骶后孔相通。向上通狭义椎管，向下开口于骶管裂孔) | |||
| 骶管 | |||
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sacral canal : 2 phrases in 1 subject |
| Surgery | 2 |
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