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