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71. | covering thread |
| 包覆线 |
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72. | rectangular thread |
| 矩形螺纹 |
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73. | chromatic thread |
| 染色丝 |
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74. | connecting thread |
| 连结线 |
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75. | vegetative thread |
| 植物质纱 |
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76. | fastening thread |
| 紧固螺纹 |
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77. | underwriter thread |
| 保险商螺纹 |
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78. | international thread |
| 国际螺纹 |
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79. | buttress thread |
| 偏梯形螺纹 |
|
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80. | horizontal thread |
| 横丝 |
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