heading and cut
| method
| heading and cut | |
| tech. | 正梯段掘进 |
| method | |
| gen. | 法; 标准; 水平 |
| environ. | 方法 |
| hydroel.st. од. | 方法 |
| mech. | 电火花法 |
| |||
| 正梯段掘进 | |||
|
heading and cut : 1 phrase in 1 subject |
| Hydroelectric power stations | 1 |