?????? ????? ????? ?????? ???? 300 ??? ????????? ????????

????? ???? Shijiazhuang Deye Piping Industries Co., Ltd. ?????? ?????? ??????? ??? ?????? ??????? ???? 300 ???. ?? ????? ??? ???????? ?????? ?? ???? ??????? ???????? ???????? ?? ????????? ???????? ?????????. ?? ????? ??? ???? 300 ???? ??? ?????? ??????? ?????? ??? ?????? ??????? ?? ?????? ????? ?? ???? ???????? ??? ?? ????? ?????? ??????? ???? ???? ????? 300 ??? ???????? ???? ????? ????? ??? ????? ??????? ???????. ??? ?? ??????? ?????? ????? ???? ????? ?????? ?? ?????? ?????? ??? ?????? ?????? ???????? ?????? ?? ?????? ??????. ????? ???????? ????? ????? ????? ????? ??? ?????? ???? ??????? ????????? ?? Shijiazhuang Deye Piping Industries Co., Ltd.? ???? ???????? ?????? ???? ???????. ???? ?????? ??????? ???? ???? ????? 300 ??? ????????? ????? ?????? ?????? ??????? ????? ?????? ??????. ???? ??? ????? ??? ?????? ?????? ??????? ???????? ?????? ?????? (HVAC)? ?? ????? ?????? ??????? ?? ????? ???????? ??????????? ??? ?????? ??????? ???? ???? ????? 300 ??? ????? ?? ?????? ???? ???? ???????? ???? ????????? ?????? ?? ?????? ????. ???? ??? ????? ????? ?????? ?? ?????? ??????? ????? ??????