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grief stem; grief kelly; kelly rod; grief joint | |||
kelly bar; kelly stem; square kelly pipe | |||
kelly; square kelly | |||
kelly joint; square shaft; torque bar; torque rod |
方钻 杆 : 118 phrases in 9 subjects |
Architecture | 2 |
Drilling | 52 |
Earth sciences | 1 |
Engineering geology | 2 |
Mechanics | 1 |
Metallurgy | 3 |
Navigation | 2 |
Oil / petroleum | 29 |
Technology | 26 |