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| 上下起伏 | |||
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| 车身上下垂直运移动 | |||
| 垂直方向往复运动 | |||
| 上下起伏 | |||
| 上下运动; 垂直方向往复 | |||
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up and down motion : 1 phrase in 1 subject |
| Dentistry | 1 |
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