短语词组短語clean top gas 淨化的爐頂煤氣clean producer gas 淨化發生爐煤氣clean flue gas damper 淨菸氣擋板clean gas outlet 淨化氣躰出口;淨化氣出口clean gas bleeder 淨煤氣放出閥clean gas pipe 淨菸道clean gas fuel 潔淨氣躰燃料clean gas heater 淨燃氣加熱器Clean gas source 潔淨氣源 返回 clean gas