10?9? ???????? ?????????????? ??????PTFE???? ????? ?????? ??? ??.???? ?????? ?? ???? ?????? ??. ?? ???????????? ?????FEP??? ???????? ???? ????,???,??,??? ??? ??? ??.??? ???? ??? ?? ???? ????PTFE?????,PTFE?????6????20??? ??? ??.??PTFE???? ??????? ???? ??? ????? ???? ??? ??? ?? ?? ?????,??? ???,?? ????? ??? ???? ??? ??.????? ???????11“/span>????? ???? ????? ???????? ??? ???1?? ??.????? ????? ?????? ??? ?????. |