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| drillstem tester | |||
| formation tester | |||
| drill-stem tester; drill stem test tool | |||
| 地 层测试器: 68 phrases in 6 subjects |
| Drilling | 9 |
| Geophysics | 30 |
| Mechanics | 1 |
| Mining | 12 |
| Oil / petroleum | 12 |
| Technology | 4 |
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