 |
| |||
| advance timbering; cantilever timbering; console support; console timbering; fore support; forepoling; overhanging beam; telescoping support | |||
|
передовая крепь : 13 phrases, 3 sujets |
| Exploitation minière | 11 |
| Géologie | 1 |
| Militaire | 1 |
|
| |||
| advance timbering; cantilever timbering; console support; console timbering; fore support; forepoling; overhanging beam; telescoping support | |||
|
передовая крепь : 13 phrases, 3 sujets |
| Exploitation minière | 11 |
| Géologie | 1 |
| Militaire | 1 |