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