???? ????? ???? ?????? ???? ?????? ?????? ?????? ?? ??????

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