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| 取心穿孔钻 | |||
| 架式凿岩机; 风钻钻机; 取芯钻 (传孔钻); 穿孔钻 | |||
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drifter drill : 7 phrases in 4 subjects |
| Consulting | 1 |
| Electronics | 1 |
| Oil / petroleum | 2 |
| Technology | 3 |
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