???? ??? DN1200 ???? ?????? ?????? ?? ?????? ???? ?????

???? ??? ?????? DN1200? ???? ?? ?????? ?? ??? ???? Shijiazhuang Deye Piping Industries Co., Ltd.? ?? ???? ????? ???? ?????? ???? ?????? ???? ??????? ?? ????? ???????? ???????. ?? ????? ???? ????? ??? ?????? ?????? ??????? ?????? ???????? ??? ????? ??????? ????????? ?? ?????? ?????? ?? ?????????? ??? ?? ??? ????? ?????? ??????????????? ??????? ?????? ?????? ??????. ???? ???? ????? DN1200 ??????? ?? ???? ????? ?????? ????? ????? ?????? ??????? ?? ???? ?????? ?? ??????? ???????. ????? ?????? ?????? ???? ????? ???? ???? ?? ???? ?????? ?????? ?????? ????? ???? ????????? ?????? ???? Shijiazhuang Deye Piping Industries Co., Ltd. ?????? ?????? ?? ?????? ?????? ????? ??? ?????? DN1200 ??? ??? ????????. ?? ??????? ??? ?????? ???????? ??? ???? ????? ??? ???? ???????? ??????? ???? ??????? ???? ????? ???????? ?? ??????? ??????. ???? ?? ???????? ?? ????????? ??????? ?? ???????? ???????? ????????? ??? ??? ?????? ??? ?????? ???? ???????? ???? ?????? ?? ??????? ????????