shield mining
| method
| shield mining | |
| mineral. од. | 掩护支架采煤法 |
| method | |
| gen. | 法; 标准; 水平 |
| environ. | 方法 |
| hydroel.st. од. | 方法 |
| mech. | 电火花法 |
| |||
| ★ 掩护支架采煤法 | |||
|
shield mining : 3 phrases in 2 subjects |
| Explosives and Explosive Ordnance Disposal | 2 |
| Technology | 1 |