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