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

?? ???? ??????? WCB ???? ????? ???? Shijiazhuang Deye Piping Industries Co., Ltd. ?? ???? ????? ???? ?????? ???? ?????? ?? ???? ??????? ???????? ????????. ????? ?? WCB (??????? ???????) ???? ??????? ??? ?????? ??? ????? ?????? ??????? ????? ?? ????????? ?? ?????? ??? ????? ?????? ??????????????? ?????? ?????? ??????? ??????? ?? ????? ??? ??? ??? 2500 ??? ??? ???? ????? ????? ???? ????? ?? -29 ???? ????? ??? 425 ???? ?????? ???? ??????? ??? ????? ????? ??????? ??????. ??? ????? ???? ??? ????? ?????? ??? ?????? ?????? ?? ?????? ???????? ??????? ?????? ???? ????? WCB ?? ???? Shijiazhuang Deye Piping Industries Co., Ltd. ?????? ?????? ????? ??? ?????? ????????? ??????? ?????? ???????? ?????. ???? ????? ??????? ??? ??????? ????????? ???????? ??????? ?????? ???????? ??? ??? ?????? ?????? ??????? ????????? ???????? ??? ???? ??????? ?????????? ??? ????? ????