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