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