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винтовой забойный двигатель (used by Russian authors only Alexander Demidov) | |||
винтовой забойный двигатель (Mosley Leigh) |
downhole screw motor: 9 phrases in 5 subjects |
Oil / petroleum | 2 |
Oil and gas | 2 |
Oil and gas technology | 1 |
Production | 1 |
Technology | 3 |