常見例句雙語例句The utility model relates to a pretreating automatic back-flushing water purifier, which relates to the water treatment technology, in particular to a water purifier.預(yù)處理自動反沖洗純水機,涉及水處理技術(shù),特別涉及一種凈化 水設(shè)備。ip.com 返回 automatic back-flushing