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| 刀头; 刀具 | |||
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bit tool : 19 phrases in 8 subjects |
| Automobiles | 1 |
| Computer numerical control | 1 |
| Drilling | 1 |
| Engineering geology | 1 |
| Oil / petroleum | 1 |
| Shipbuilding | 1 |
| Space | 1 |
| Technology | 12 |
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