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| alloy drill bit; bit of carbide insert; carbide insert bit | |||
| alloy drill bit | |||
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合金钻头 : 75 phrases in 8 subjects |
| Construction | 1 |
| Drilling | 15 |
| Electric machinery | 1 |
| Engineering geology | 8 |
| Mechanics | 7 |
| Metallurgy | 1 |
| Oil / petroleum | 12 |
| Technology | 30 |
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