 |
| |||
| board-and-pillar work; bord-and-pillar work; breast-and-pillar work; breast-and-pillar; room-and-rance (с нарезкой узких столбов) | |||
| камерно-столбовая выемка: 14 phrases in 2 subjects |
| Mining | 13 |
| Oil / petroleum | 1 |
|
| |||
| board-and-pillar work; bord-and-pillar work; breast-and-pillar work; breast-and-pillar; room-and-rance (с нарезкой узких столбов) | |||
| камерно-столбовая выемка: 14 phrases in 2 subjects |
| Mining | 13 |
| Oil / petroleum | 1 |