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| 41. | torquing of nuts |
| 转矩拉紧螺母 |
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| 42. | nut lock spring |
| 锁紧螺母簧 |
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| 43. | nut of propeller shaft |
| 螺旋桨轴螺母 |
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| 44. | hexagonal brass nut |
| 铜六角螺母 |
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| 45. | hexagon die nut |
| 六角板牙螺母 |
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| 46. | ring nut spanner |
| 圆顶螺母扳手 |
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| 47. | hezagon castle (slotted )nut |
| 开槽六角螺母 |
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| 48. | castle circular nut |
| 六角圆顶螺母 |
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| 49. | screw the nut(up)tight |
| 把螺母拧紧. |
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| 50. | nut and bolt (NAB) |
| 螺母及螺栓 |
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