half section excavation
| method
| half section excavation | |
| tech. | 半断面开挖 |
| method | |
| gen. | 法; 标准; 水平 |
| environ. | 方法 |
| hydroel.st. од. | 方法 |
| mech. | 电火花法 |
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| 半断面开挖 | |||
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half section excavation : 4 phrases in 2 subjects |
| Explosives and Explosive Ordnance Disposal | 1 |
| Technology | 3 |