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???? ??? ?????? 1/2? 3/4 ?1 ???? ?? ?????? ?????? Shijiazhuang Deye Piping Idndustrys Co.,Ltd. ?? ?? ????? ????? ?????? ?? ???? ??????? ???????? ?? ????? ????????. ?? ????? ?????? ????? ??? ???? ?????? ?????? ????? ?????? ????? ??????? ???????? ??? ???? ??????? ???????? ?????? ????????? ???????? ?????????? ??? ?????? ?? ???? ????? ??????? ?????? ?????? ????? ????? ????? ????? ??????? ?????? ??????? ??????? ????? ?? ???? ??????? ?????? ???????. ????? ?????? ????? ???? 1/2 ?3/4 ?1 ???? ????? ????? ?????? ?????? ??? ?????? ???? ??????? ????????? ???? ??????? ??????? ???????? ?????? ?????? ???????? ???? ?????? ????? ?????? ??? ????? ??????? ???? ???? ????? ??? ???? ?? ??? ?????? ?? ????? ????????. ???????? ????????. ???? ?? ????????? ?? ??????? ?? ??????? ???????? ?????? ?????? (HVAC) ?? ?????? ?????? ?? ????? ?????? ????????? ??? ?????? ????? ??? ???? ???? ????? ??????? ?????? ?? ??????? ???? Shijiazhuang Deye Piping Idndustrys Co.,Ltd. ??? ???????? ?????? ??? ?????? ??????? ??????? ???????