??? ?????? ????? ??? ???? ????? ???? ????, ?????? ?? ???? ?????? ????? ?????? ?????, ????????? ??????? ???????? ?????, ??????? ?????? ?????, ????? ?????? ????? ?? ????-SI ?????????????? ?????, ??? ?????? ???? ?? ??????? ?? ????? ?????? ?? ???????? ?????, ??? ??????? ???? ?? ?????? ???? ????? ?????? ?????, ???-?? ????? ?? ????????? ??????? ???????? ?????, ?? ??, ???, ??????? ??? ????? ?????????? ??????? 5-150 ????, ?? ????????? ??? ???? ????, ????????? ???????? 1080 oC ??????? ??? ????? ????????? ??????? 5 ?????? ????? ??? ????? ?????? ??? 25% ???? 40%?