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| 71. | context segment value |
| 上下文段值 |
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| 72. | alternating up and down sweep |
| 交互上下扫描 |
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| 73. | tubing reciprocation |
| 油管上下运动 |
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| 74. | up-and-down traffic |
| 上下对开行车 |
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| 75. | period of dipping and heaving |
| 上下浮动周期 |
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| 76. | move the flag up and down |
| 上下摇动旗子 |
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| 77. | superior-inferior point combination (association) |
| 上下配穴法 |
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| 78. | up-and-down pull on the drawbar |
| 上下推动牵引钩 |
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| 79. | search high and low |
| 上下到处搜寻 |
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| 80. | up-down collar-press |
| 上下领压机 |
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