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