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| 管钻; 内螺纹车丝锥 | |||
| pipe drill: 300 phrase in 12 subjects |
| Bridge construction | 1 |
| Drilling | 85 |
| Earth sciences | 9 |
| Engineering geology | 2 |
| General | 1 |
| Geophysics | 3 |
| Mechanics | 11 |
| Metallurgy | 8 |
| Oil / petroleum | 90 |
| Shipbuilding | 1 |
| Steel production | 2 |
| Technology | 87 |
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