???? ???? ???? ?????? Ptfe ???? ?????? ????? ?????

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