???? ??????? WCB: ?????? ????? ?????? ????????? ????????

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