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