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???? Shijiazhuang Deye Piping Industry Co., Ltd. ?????? ?? ????? ?????? ?????? ??????? ????? ?????? ?????? ????????? ????????. ?? ????? ?????? ?????? ??????? ???????? ?????? ??? ???? ?????? ???? ????? ????? ?? ?????? ?? ???? ????????? ??? ?? ?????? ??????? ?????? ??? ?????? ?? ???? ?????? ??? ??????? ??????? ????? ???????? ???????? ??????? ?????? ??? ???? ??????? ??????? ??? ????? ??????. ????? ??? ???????? ?????? ?????? ???????? ??? ?????? ????????? ??????? ?????? ????????? ??? ?? ??? ????? ?????? ??????? ?????????? ??????? ?????? ???????? ???????? ?????? ?????? (HVAC). ?? ??? ?????? ??????? ????? ????? ???? ?????? ????? ???? ????? ?????? ?? ???????? ???????? ??? ???? ??? ????? ?????? ??????? ?????? ???????. ???? ??????? ????????? ???????? ????? ????? ?????? ????? ????? ?????? ?? ?????? ?????? ?? ????? ?? ?????? ????????? ???????? ??? ???? Shijiazhuang Deye Piping Industry Co., Ltd. ????? ??????? ?? ??????? ??????? ???????? ???????? ?? ??? ??????? ?????? ????????? ???????? . ???? ??? ????? ?????? ??? ???? ?? ????????? ??? ?????? ??????? ???????? ?????? ?? ????????