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41. | friction rolling hatch cover |
| 摩擦滚动舱口盖 |
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42. | axis of rolling |
| 滚动轴;轧制线 |
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43. | rolling contact gear |
| 滚动接触齿轮系 |
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44. | detector with rolling grating |
| 滚动光栅检测头 |
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45. | rolling shed loom |
| 滚动梭口织机 |
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46. | Rolling radius of driving wheel |
| 驱动轮滚动半径 |
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47. | intercardinal rolling error |
| 四方中点滚动误差 |
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48. | end-rolling hatch cover |
| 纵向滚动舱口盖 |
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49. | rolling diameter of wheel tread |
| 轮辋滚动直径 |
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50. | rolling landside |
| 滚动犁侧板|尾轮 |
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