sequential excavation
| method
| sequential excavation | |
| tech. | 分步开挖 |
| method | |
| gen. | 法; 标准; 水平 |
| environ. | 方法 |
| hydroel.st. од. | 方法 |
| mech. | 电火花法 |
| |||
| 分步开挖 | |||
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sequential excavation : 1 phrase in 1 subject |
| Earth sciences | 1 |