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| 牙轮镶齿; 钻头孕镶块 | |||
| 钻头镶嵌块 | |||
| bit insert: 66 phrases in 8 subjects |
| Automobiles | 4 |
| Drilling | 15 |
| Electronics | 2 |
| Engineering geology | 7 |
| Mechanics | 1 |
| Metallurgy | 1 |
| Oil / petroleum | 12 |
| Technology | 24 |
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