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| 钻〔凿〕井机; 打井机具 | |||
| 钻机 | |||
| 钻井设备 | |||
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| 钻〔凿〕井机 | |||
| 打井机具; 钻井机; 凿井机 | |||
| 打井设备; 凿井机 (器); 打井机器; 钻井机 (架) | |||
| well rig: 8 phrases in 3 subjects |
| Engineering geology | 1 |
| Technology | 6 |
| United Nations | 1 |
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