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| 深部 (位于浅部的上方，肌束呈环形，前方部分肌纤维与会阴浅横肌交织°后方部分肌纤维附着于肛尾韧带。上部肌纤维与耻骨直肠肌交织) | |||
| 深部 | |||
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deep part : 4 phrases in 4 subjects |
| Aviation | 1 |
| Metallurgy | 1 |
| Plastics | 1 |
| Technology | 1 |
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