短語(yǔ)詞組短語(yǔ)Hazard d rating 危險(xiǎn)級(jí)別Recognize hazard material rating 識(shí)別危險(xiǎn)物料的等級(jí)Hazard Rating Systems 危險(xiǎn)等級(jí)Hazard Rating Number 危險(xiǎn)分級(jí)數(shù)Exposure Hazard Rating 暴露危害評(píng)比數(shù)Rockfall Hazard Rating System 落石災(zāi)害危險(xiǎn)性分級(jí)系統(tǒng)fire hazard rating 火災(zāi)危險(xiǎn)等級(jí)hazard rating of backflow pollution 回流污染危險(xiǎn)等級(jí) 返回 hazard rating