Under optimal conditions of poly-aluminium chloride, addition of 6 mg/L PAM as an aide coagulant only raised alga removal rate by 3%.是什么意思_Under optimal conditions of poly-aluminium chloride, addition of 6 mg/L PAM as an aide coagulant only raised alga removal rate by 3%.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句