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| 81. | vibrating needle |
| 摆动磁针 |
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| 82. | oscillating movement |
| 摆动|振动 |
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| 83. | oscillating riddle |
| 摆动筛 |
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| 84. | roll distortion |
| 摆动畸变 |
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| 85. | drill pipe wobbling |
| 钻杆摆动 |
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| 86. | wobble coefficient |
| 摆动系数 |
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| 87. | irregular fluctuatio |
| 不规则摆动 |
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| 88. | swinging mirror |
| 摆动反射镜 |
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| 89. | centrifugal swing |
| 离心摆动 |
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| 90. | rocking apparatus |
| 摆动设备 |
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