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| 钻杆接头; 钻杆接箍 | |||
| 杆连接器; 活塞杆连接器 | |||
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rod coupling : 21 phrases in 6 subjects |
| Automobiles | 3 |
| Electronics | 3 |
| Engineering geology | 3 |
| Metallurgy | 2 |
| Oil / petroleum | 3 |
| Technology | 7 |
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