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drilling : 547 phrases in 16 subjects |
Coal | 6 |
Construction | 10 |
Earth sciences | 1 |
Ecology | 2 |
Environment | 4 |
General | 9 |
Law | 1 |
Mechanic engineering | 1 |
Microelectronics | 1 |
Military | 17 |
Mining | 1 |
Oil / petroleum | 8 |
Oil and gas | 476 |
Road construction | 1 |
Seismology | 2 |
Technology | 7 |