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現(xiàn)在家裝給水管一般都用PP_R管,家里用水量大進(jìn)水管可用DN32.,分支管用DN25,支管用DN20,如果只是一廚一衛(wèi)進(jìn)水管可用DN25,排水管立管用PVC100的,坐便器用100的,其他支管用50的,廚房立管100或者75,支管用50的.
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