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| 手工具旋具头组套 | |||
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bit set : 43 phrases in 13 subjects |
| Architecture | 1 |
| Construction | 1 |
| Drilling | 4 |
| Electronics | 2 |
| Engineering geology | 2 |
| Geophysics | 1 |
| Mechanics | 1 |
| Metallurgy | 2 |
| Oil / petroleum | 4 |
| Project management | 1 |
| Rail transport | 1 |
| Shipbuilding | 1 |
| Technology | 22 |
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