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