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| 活钻头; 岩心钻头 | |||
| 钻头 | |||
| 岩芯钻头; 凿岩机钎子; 可拆式钻头; 活络钻头; 千斤顶帽; 手持式风钻钎子 | |||
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jackbit : 3 phrases in 2 subjects |
| Architecture | 1 |
| Technology | 2 |
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