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| 外钳; 下大钳; 卸钻杆时的转动大钳 | |||
| 上管钳 (拧开下管钳固定接头时使用) | |||
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| 紧扣钳; 外钳 | |||
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lead tongs : 5 phrases in 2 subjects |
| Drilling | 4 |
| Technology | 1 |
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