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