常見例句雙語例句From the large amount of ash deposited in the pre-heater and flue gas duct which mostly contains sulfate, it could be concluded that the corrosion was the sulfuric acid dew point corrosion.與此同時，在預熱器及煙道內發(fā)現有大量灰垢，其主要成分為硫酸鹽，可判斷腐蝕系硫酸露點腐蝕所致。 返回 duct heater