Wastewater from city was treated using primary flocculant polyferric sulfate ( PFS) and coagulant aid amphoteric sesbania gum (ASG).是什么意思_Wastewater from city was treated using primary flocculant polyferric sulfate ( PFS) and coagulant aid amphoteric sesbania gum (ASG).在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句