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81. | hydroelectric joint |
| 水电接头 |
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82. | revolving joint |
| 旋转接头 |
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83. | bayonet connector |
| 卡口接头 |
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84. | drain cock joint |
| 排水阀接头 |
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85. | Union Joint |
| 活接头 |
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86. | multiple-spot welded joint |
| 多点接头 |
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87. | hexagonal shoulder nipple |
| 内六角接头 |
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88. | break connection |
| 断路接头 |
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89. | fuel pipe union |
| 油管接头 |
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90. | fibre optic splice |
| 光纤接头 |
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