???? ???? ???? 20 ???? DN600 ?????? ?? ?????? ???? ????? | ????? ????

?????? ?????? DN600 20 ???? ?????? ?? ???? Shijiazhuang Deye Piping Industries Co.,Ltd. ?? ???? ????? ???? ?????? ???? ?????? ?????? ?????? ????????. ??? ?????? ?????? ????? ??????? ????? ?? ?????????? ??? ?? ??? ??????? ??????????? ?????? ??????? ?????? ?? ????????? ??? ????? ?????? ????? ????? ????? ??????? ????? ??? ?????? ?????? ???????? ??????? ??????? ??????????. ???? ??? DN600 ?????? ?????? ?? ?????? ?????? ???????? ????? ??????? ??? ???? ??????? ????? ????? ?????? ?? ?????? ?????? ?????? ?????? ?????? ????? ??? ?????? ????? ??????? ??? ????? ??????? ????? ??????? ???????. ????????? ????? ???????? ???? ????? ?????? ????? ??????? ??? ???? ?????? ?????? ????? ?????? Shijiazhuang Deye Piping Industries Co.,Ltd. ????? ???? DN600 ?????? ?????? ?????? ?? ?????? ??????? ?????? ?????? ?????? DN600 ???? 20 ???? ?????? ????? ??? ??????? ?? ????? ?????? ???? ???????. ???? ????? ?????????? ???????? ??? ??? ?????? ?????? ?????? ??????? ????????? ???????? ??????