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