短語(yǔ)詞組短語(yǔ)gas fume fastness 耐煙熏色牢度gas fume fastness testing 耐煙熏色牢度試驗(yàn)gas fume fadding 煙熏退色fume gas 煙氣fume gas cleaning 煙氣凈化fume gas pollution 煙氣污染fume gas collecting efficiency 集氣效率pitch fume gas 瀝青煙fume gas isolating valve 煙氣隔離閥 返回 gas fume