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| 31. | fire-resisting rolling shutter |
| 防火滚动挡板 |
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| 32. | rolling test vehicle |
| 滚动试验飞行器 |
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| 33. | rolling diaphragm actuator |
| 滚动膜片执行机构 |
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| 34. | rolling rotor compressor |
| 滚动转子式压缩机 |
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| 35. | rolling direction |
| 轧制方向|滚动方向 |
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| 36. | rolling resistance of track |
| 履带滚动阻力 |
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| 37. | equilibrium about rolling axis |
| 滚动力矩平衡 |
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| 38. | The rock is rolling. |
| 岩石在滚动. |
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| 39. | coefficient of rolling resistance |
| 滚动阻力系数 |
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| 40. | true-rolling bit |
| 纯滚动牙轮钻头 |
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