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| 螺形钻头 | |||
| 螺孔钻; 螺纹底孔钻 | |||
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tap drill : 14 phrases in 7 subjects |
| Business | 1 |
| Computer numerical control | 1 |
| Construction | 1 |
| Drilling | 1 |
| Engineering geology | 2 |
| Oil / petroleum | 1 |
| Technology | 7 |
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