???? ?????? ?????? ?????? ?? PFA ??????? ???????? ?????

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