 |
| |||
| pyramid stoping | |||
| edge seam mining; inclined cut-and-fill (method); inclined cut-and-fill stoping; longwall peak stoping | |||
| Schrägbau: 1 phrase in 1 subject |
| Mining | 1 |
|
| |||
| pyramid stoping | |||
| edge seam mining; inclined cut-and-fill (method); inclined cut-and-fill stoping; longwall peak stoping | |||
| Schrägbau: 1 phrase in 1 subject |
| Mining | 1 |