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逆滲透膜將已經過前置處理過的水以逆滲透原理處理,可將水中所含不純雜質如熱原、濾過性病毒、細菌、毒素化合物,砷、鈷、鎘、汞等重金屬及危害人體健康的物質過濾,使雜質與純水分開,造出無菌、無害的純水,有害物質則併同廢水排掉
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