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| 动垂线; 视垂线 | |||
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| 表观垂线 | |||
| 动态垂线; 表观垂线 (重力加速度和运动加速度合成矢量的方向) | |||
| 动垂线; 视垂线 | |||
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dynamical vertical : 9 phrases in 4 subjects |
| Bridge construction | 2 |
| Electronics | 1 |
| Rail transport | 2 |
| Technology | 4 |
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