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| двухлопастное долото; лопастное долото; режуще-скалывающее долото | |||
| режущее долото | |||
| долото лопастного типа | |||
| 刮刀钻头: 12 phrases in 5 subjects |
| Construction | 2 |
| Drilling | 3 |
| General | 2 |
| Oil / petroleum | 4 |
| Oil and gas technology | 1 |
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