???? ????? ??????? ???? 18 ???? Dn450 ????????? ???????? | ???? ????

???? ????? ??????? Dn450 ???? 18 ???? ?? ???? ????? ???? ?????? ?? ?????? ??????? ?????? ???? Shijiazhuang Deye Piping Industry Co., Ltd.. ?? ????? ??? ?????? ???? ????? ????? ?????? ?????? ???????? ?? ????????? ????????? ???? ????? ??????? Dn450 ???? 18 ???? ????? ??? ?????? ??????? ????? ?? ???????? ??? ?? ??? ????? ?????? ??????????????? ?????? ??????. ??? ????? ?????? ??? ??????? ?? ???? ??? ???? ?????? ??????? ????????. ?? ????? ?????? ?? ???? ????? ??????? ??? ???? ?????? ?????? ?????????? ??? ????? ??????? ??? ?? ????? ?????? ?????? ???? ???? ?? ??????? ??? ????? ??????? ?????? ???? ??????? ?? ???? ????????. ??? ?? ??????? ????? ????? ????? ?????? ?????? ??????? ???????? ??? ?????? ?????? ???? ???????? ???? ????????? ??????? ?? Shijiazhuang Deye Piping Industry Co., Ltd.? ??? ??????? ?????? ?????? ????? ?????? ???? ???? ?????? ???????. ?? ???? ????? ??????? Dn450 ???? 18 ???? ????? ??? ?? ????? ??? ??????? ?? ?????? ????????? ?????? ???? ?????? ????????