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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 | |||
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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 |
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