| |||
| shaft pillar (ABelonogov) | |||
| protective pillar; protecting pillar; safety pillar | |||
|
охранный целик : 11 phrases in 2 subjects |
| Gas processing plants | 7 |
| Mining | 4 |
| |||
| shaft pillar (ABelonogov) | |||
| protective pillar; protecting pillar; safety pillar | |||
|
охранный целик : 11 phrases in 2 subjects |
| Gas processing plants | 7 |
| Mining | 4 |