???? ???? ????? 50WOG ???? ?????? ????????? ???????

??? ???? ??????? 50WOG ???? ?? ?????? ?????? Shijiazhuang Deye Piping Industry Co., Ltd. ?????? ??????? ?????? ?? ???? ??????? ?? ????????? ???????? ????????. ?? ????? ??? ?????? ???? ?????? ?? ???? ?????? ??? ???? ????????? ??????? ?????? ??? ????? ??????? ?? ??? ??? ??? ??? 50WOG? ??? ???? ??????? ??? ??????? ??????? ????? ?? ?????????? ?? ????? ?????? ?????? ??? ????? ???????? ??????????. ??????? ????? ?????? ????? ??? ???? ???? ??????? ???????? ??? ?????? ?????? ???? ???????? ???? ??????? ??????? ?? ????? ???? ??????? 50WOG ?????? ??????? ????????? ?? ????? ??? ????????? ???? ??? ????? ???????. ??????? ???????? ?????? ???? ??? ?????? ??? ???? ?????? ??? ?????? ????????? ?????????? ????????? ????? ???? Shijiazhuang Deye Piping Industry Co., Ltd. ?????? ?????? ????? ?????? ???? ???????? ???????? ????????. ?? ??????? ??? ????????? ???????? ??? ???? ??????? 50WOG ??? ?????? ??????? ??? ????? ????? ?????? ?????? ?? ??????