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| 71. | rail joint heater |
| 钢轨接头加热器 |
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| 72. | electric riveted joint |
| 电铆接头 |
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| 73. | expansion joint cover |
| 伸缩接头复盖 |
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| 74. | bonded insulated joint |
| 粘结绝缘接头 |
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| 75. | standard tool joint |
| 标准钻杆接头 |
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| 76. | arc-welded joint |
| 弧焊接头 |
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| 77. | tool joint wobble |
| 工具接头摆动 |
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| 78. | apron bolt joint |
| 平板带接头 |
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| 79. | mock tool joint |
| 假钻杆接头 |
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| 80. | card ball joint |
| 球形万向接头 |
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