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| разведочное бурение | |||
| разведочное бурение (钻探井); пробное бурение; разведочная скважина | |||
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勘探钻井 : 6 phrases in 4 subjects |
| Drilling | 3 |
| General | 1 |
| Geology | 1 |
| Oil / petroleum | 1 |
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