pillar method of stoping
相关英语词汇推荐
- single stage separation
- alidade
- burning time
- cement injection
- worm gear drive
- through
- full load running
- lump formation
- elastoplastic rock
- crusher head
- drop crushing
- tunneling equipment
- Intermediate product
- internal impedance
- workings
- Residual expansion rate
- hand held drifter
- tilting cup feeder
- bolt installing equipments
- fast extraction