 |
| |||
| square-set method of stoping; square-set method | |||
| square-set system | |||
| система разработки с креплением станковой крепью: 12 phrases in 2 subjects |
| Mining | 9 |
| Technology | 3 |
|
| |||
| square-set method of stoping; square-set method | |||
| square-set system | |||
| система разработки с креплением станковой крепью: 12 phrases in 2 subjects |
| Mining | 9 |
| Technology | 3 |