subsurface excavation
| method
| subsurface excavation | |
| bridg.constr. | 地下开挖 |
| method | |
| gen. | 法; 标准; 水平 |
| environ. | 方法 |
| hydroel.st. од. | 方法 |
| mech. | 电火花法 |
| |||
| 地下开挖 | |||
| 地下采掘 | |||
|
subsurface excavation : 1 phrase in 1 subject |
| Engineering geology | 1 |