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SB ????? ?????? ??????? ????? ?????? ????, ????????? ???????? ?? ??????? ?????????? ??? ?????? ??????? ?? ?????? ?????? ??????? ??? ?????? ????. ???? ??????????? ??? ????, ?? ?????, ?????? ?? ???? ?? ???? ????? ???? ??. ????? ??????? ???? ???? ??????????? ??? 600 ??.??. ???????. ?????? ??????? ???? ???? ??????????? ??? 300-600 ??.??. ??. ???? ??????? ???? ???? ??????????? ??? 300 ??.??. ? ????. ????????, ?????? ?????????? ????? ??????? ?????? 320Mpa ??. ??? ?????? ???????? ??? ???????????, ????????? ?????? ???? ?? ??? ?????????????????? ????????????. ??? ?????? ????????? ??????????? ????...