?????? ?????? ?????? ??? ????? ??????? ??? 300: ???? ????? ?????? ????????? ????????

?? ?????? ?????? ?????? ??? ????? ??????? 300# ?????? ?? ???? Shijiazhuang Deye Piping Industries Co., Ltd. ?? ???? ????? ???? ?????? ???? ????? ????? ????? ?? ????????? ??????. ????? ?????? ?????? ???? ??? ????? ???????? ??? ???? ?????? ?????? ???????? ??? ????? ??????? ?????? ????? ?????? ?????? ??????? ????????? ????? ??? ?????? ?????? ??????? ?? ???? ?????? ??? ???? ???? ????? ????? ?????? ?? ??????? ???????? ??? ???? ????? ?????? ???? ?????????. ?? ??????? ??????? ???????? ?????? ?????? ????????? ?? ????? ????????? ??? ?? ??? ????? ?????? ??????????????? ?????? ?????? ???????? ?? ?????? ?? ?????? ????? ???????? ??????? ???????? ???? ????? ?????? ?????? ?????? ??? ????? ??????? 300# ?????? ???????? ????? ??????? ???????. ???????? ??? ???? ??? ????? ?????????? ????? ???????? ???? ?????? ??????? ??? ??????? ??????? ??? ???? ??????? ?????????? ?? ???????? ??????? ?? ?? Shijiazhuang Deye Piping Industries Co., Ltd. ????? ???????? ???????? ????? ?????? ???????? ????.