???? ??? ?????? ??? DN600 ?????? - ???? ???? ?????? ??? ???? ????? ??????

???? ??? ?????? DN600 ?????? ?? ???? Shijiazhuang Deye Piping Industries Co.,Ltd. ?? ???? ???? ?????? ?????? ???? ?????? ???????? ????????? ???????? ????????. ???? DN600? ??? ???? ????? ??? ??????? ??????? ?? ?????? ?????? ???????? ??? ????? ?????? ??????? ?????? ???????? ????????? ??? ???? ???? ????? ???? ??????? ?? ???? ???? ?????? ?????? ????? ????? ????? ???????? ?????. ??? ???? ???? ???? ?????? ?????? ????? ????? ??????? ??? ????? ?? ??????? ???????? ???? ???. ????? ?????? ?????? ???? ????? ????? ??? ???? ?????? ??????? ????????? Shijiazhuang Deye Piping Industries Co.,Ltd. ????? ?????? ?????? ?? ?????? ?????? ????? ????? ?????????. ?? ??????? ??? ?????? ???????? ??? ???? ????? DN600 ????? ??? ???? ?????? ?? ??? ??????? ????? ?????? ????? ???????? ?? ?????? ?? ??????? ????????. ???? ??????? ????? ?? ????? ?? ????? ?? ??????? ??????? ??? ???? ????? ??? ?? ???? ???? ???????? ???? ????????? ???????? ?????? ??