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| 71. | semifinished hexagon nut |
| 半光六角螺母 |
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| 72. | nut shaping machine |
| 螺帽成型机 |
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| 73. | hexagon check nut |
| 六角防松螺母 |
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| 74. | ring nut spanner |
| 圆顶螺母扳手 |
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| 75. | hexagon die nut |
| 六角板牙螺母 |
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| 76. | self locking nut |
| 自销螺母 |
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| 77. | shoulder nut eyebolt |
| 环首带肩螺栓 |
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| 78. | bankoul nut oil |
| 石栗油 |
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| 79. | grooved hexagonal nut |
| 带槽六角螺母 |
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| 80. | left-handed nut |
| 左旋螺母 |
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