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

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