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