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| 双层岩心管 | |||
| 取芯双管钻具; 双管式岩芯管; 双管取芯钻具; 双层岩芯管; 双层取芯器; 双层取芯管 | |||
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| 双筒取心筒 | |||
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double tube core barrel : 30 phrases in 4 subjects |
| Drilling | 4 |
| Engineering geology | 7 |
| Oil / petroleum | 4 |
| Technology | 15 |
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