短語(yǔ)詞組短語(yǔ)smoke generation mechanism 發(fā)煙機(jī)構(gòu)smoke generation rate 煙生成率low smoke generation 低發(fā)煙smoke generation coefficient 生煙系數(shù)a non -halogen low smoke generation 無(wú)鹵低煙 返回 smoke generation