???? ????? BB/WB OS&Y: ???? ????? ?????? ???????

???? ??????? BB/WB OS&Y ?????? ?? ???? Shijiazhuang Deye Piping Industries Co.,Ltd. ?? ???? ???? ?????? ?????? ???? ?????? ????????? ????????. ?? ????? ??? ?????? ????? ???? ???? ??????? ?????? ????? ????? ?????? ??? ???? ????? ??????? ????????. ?? ????? ???? ??????? BB/WB OS&Y ???????? ???? ?????? ?????????? ??????? ??? ????? ??????? ??????? ????? ?? ???? ?????. ??? ???? ?????? ?????? ?????? ?? ?????? ????? ????? ??????? ?????????? ??? ????? ??????. ??? ?????? ????? ?????? ?????? ???????? ????? ?????? ?????????? ??????? ?????? ????????. ?? ?????? ?????? ???????? ??????? ?????? ?????? ???? ???????? ???? ????????? ?????? ?? ????? ?????? ??????????????? ?????? ?????? ?????? ?? ????????? Shijiazhuang Deye Piping Industries Co.,Ltd. ???? ?????? ?????? ????? ?????? ???? ???????? ??????? ???????? ???????. ?? ??????? ??? ?????? ???????? ????????? ?? ??? ???????? ??? ???? ??????? BB/WB OS&Y ????? ?????? ??? ???? ?????