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