???? ??????? DN200 ???? ?????? ????????? ????????

?? ???? ??????? DN200 ???? ????? ???? Shijiazhuang Deye Piping Industry Co., Ltd. ?? ???? ????? ???? ?????? ???? ????? ????? ????? ?? ????? ?????????. ??? ?????? ????? ????????? ?? ?????? ??? ????? ?????? ??????????????? ?????? ?????? ??????? ??????? ??? ????? ?? ???? ????? ?????? ?????? ????? ???? ??????? DN200 ????? ??? ??????? ?????? ???? ??????? ??? ???? ?????? ????? ??????? ?? ???????. ??? ???? ??????? ?? ??????? ????? ?????? ?????? ??????? ???????? ??? ????? ?????? ????? ??????????? ???????? ????? ??????? ??????? ?????? ???? ??????? DN200 ????? ?????? ??? ??????? ???????? ???????? ??????? ????? ?????? ??????? ?????? ????? ???? ???????. ?? ?????? ?? ????????? ??????? ???????? ?????????? ??? ????? ?????? ????????? ???? ????? ??? ?????? ?????? ???????? ??????? ???????? ?????? ???? Shijiazhuang Deye Piping Industry Co., Ltd. ?????? ?????? ????? ?????? ????? ????? ?????????? ??? ???? ??? ?????? ?????? ????? ???????? ????????