Cyclic Activated Sludge System (CASS) is one of advanced sewage water treatment processes and it suits the conditions of our country.是什么意思_Cyclic Activated Sludge System (CASS) is one of advanced sewage water treatment processes and it suits the conditions of our country.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句