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| 牙轮轴线与钻头底平面的夹角 | |||
| 牙轮轴倾角 | |||
| pin angle: 12 phrases in 5 subjects |
| Architecture | 1 |
| Drilling | 1 |
| Oil / petroleum | 2 |
| Space | 1 |
| Technology | 7 |
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