极危险物质
extremely hazardous substances
危险物质的运输
Transport of hazardous materials
危险物质专科科长
head hazmat specialist branch
危险与有害物质危险与有毒物质
Hazardous and Noxious Substance
杂项危险物质
miscellaneous dangerous substances
miscellaneous dangerous substance
点火及火焰监测
flame ignition and flame monitoring
较大失火危险的起居处所
accommodation space of greater fire risk
较小失火危险的起居处所
accommodation space of minor fire risk