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| 81. | Coaxial connector |
| 同轴接头 |
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| 82. | hydroelectric joint |
| 水电接头 |
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| 83. | break connection |
| 断路接头 |
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| 84. | oxygen connection |
| 氧气接头 |
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| 85. | drain cock joint |
| 排水阀接头 |
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| 86. | directional sub |
| 定向接头 |
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| 87. | fibre optic splice |
| 光纤接头 |
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| 88. | overflow adapter |
| 溢流接头 |
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| 89. | electric cable connector |
| 电缆接头 |
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| 90. | optical cable splice |
| 光缆接头 |
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