???? ????? ????? ?? ???? PTFE ???? ?????? ????? ?????

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