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