pilot drift
| method
| pilot drift | |
| el. | 导洞巷道 |
| eng.geol. | 掌子面 |
| hydroel.st. | 导洞; 巷道; 导洞掘进 |
| method | |
| gen. | 法; 标准; 水平 |
| environ. | 方法 |
| hydroel.st. од. | 方法 |
| mech. | 电火花法 |
| |||
| 导洞巷道 | |||
| 掌子面 | |||
| 导洞; 巷道; 导洞掘进 | |||
| 超前导坑; 先进导坑; 导洞掌子面; 超前巷道 | |||
|
pilot drift : 3 phrases in 2 subjects |
| Explosives and Explosive Ordnance Disposal | 1 |
| Hydroelectric power stations | 2 |