alternating tread staircase
相关英语词汇推荐
- avoidable accident
- data acquisition and processing
- fire drencher
- watering system
- fire-proof fiber;fireproof
- compressed air tool
- door holding device
- combustion space
- control state
- Firemaster CA
- α-AlH3
- Cauterization
- fail-obvious condition
- composite explosive
- ceiling panel heating
- resource officer
- thermal fracture
- water officer;water supply officer
- forest farm
- minimum occupant load