???? ??? F51 ???? ?????? ?????? ?????? ?? ?????? | ????? ????!

???? ????? F51 ?????? ?? ???? Shijiazhuang Deye Piping Industries Co.,Ltd. ?? ???? ????? ????? ?????? ???? ?????? ????????? ????????. ???? ????? ??? ????? ?? ??????? ??????? F51? ??? ????? ??????? ?????? ?????? ?????? ????????? ?? ??????? ??????? ??? ?? ????? ???? ????? F51 ???? ?????? ?????? ?? ????? ????????? ??? ???? ????? ?????? ??????? ??????. ???? ?????? ?????? ???????? ?????? ???????? ????? ????????? ??? ?? ?? ???? ????? ????? ??????? ???????? ?????? ???? ????? ??? ?? ?????? ?? ??????? ???????? ????? ?????? ?????????? ??????? ????????? ????????. ??? ????? ????????? ?? ?????? ??? ?????????????? ?????? ?????? ??????? ??????? ?? ??????? ??? ?????? ???????? ??? Shijiazhuang Deye Piping Industries Co.,Ltd. ???? ????? ?????? ??????? ????? ???? ???????? ????? ???????? ???? ???????? ?????? ???. ??? ???? ????? F51 ?????? ????? ??? ??? ????????? ??? ???? ????? ???? ????? ????? ???????? ???? ?? ??????? ??????