???? ??? ???? ?????? ?????? ?????? ?? PTFE | ???? ????? ??????

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