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| 水力挖土法; 水力開挖 | |||
| 水力开挖; 水力冲挖 | |||
| 水力挖掘; 水力挖方 | |||
| 水力开采; 疏浚 | |||
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| 水力挖掘 | |||
| 水力冲挖; 水力开挖 | |||
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hydraulic excavation : 3 phrases in 2 subjects |
| Consulting | 1 |
| Hydroelectric power stations | 2 |
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