???? ???? F53 ???? ?????? ???????? ?????? ??????

??????????? ??? ???????? ???????? ????????. ???? ?????? ???? ????? F53 ????? ???? ?????? ?????? ????????? ??????? ????????? ????????. ?? ????? ?????? ?????? F53 ????? ??? ?????? ????? ????? ????? ??????? ????? ????? ??????? ?????? ????? ?????? ??? ?? ????? ?????? ?????? F53 ?? ??????? ??????? ????? ???? ???????? F53? ??? ????? ??????? ?????? ?????? ??????? ?? ??????? ???????. ???? ??????? ?????? ???????? ????? ???????? ??????? ??? ???? ?????? ??????? ?? ?????? ??????. ???? ????? ????? ??? ????? ??????? ????? ?? ?????????? ??? ?? ??? ???????? ??????? ?????? ?????????????? ??????????? ????????? ??? ???? ?????? ?????? ?????? ?????? ???? ????? F53 ?? Shijiazhuang Deye Piping Industries Co.,Ltd. ???? ?????? ?????? ???????? ????? ?? ????? ???????? ?????? ??. ?? ???????? ??????? ???? ???????? ??? ???? ??????? ??????? ????????. ????? Shijiazhuang Deye Piping Industries Co.,Ltd. ????? ???????? ???????? ???????? ?????? ??