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| 导引盖 | |||
| 砸套管护帽; 击入式管头保护帽 | |||
| 桩帽; 套管帽 | |||
| 管帽 (把管子打入地层时保护管) | |||
| 引帽; 引盖; 导盖; 锤帽; 打头护帽 | |||
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drive cap : 8 phrases in 3 subjects |
| Engineering geology | 2 |
| Oil / petroleum | 3 |
| Technology | 3 |
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