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