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40Cr ???? 42CrMo ?? ??? ??????? ????? ????? ?????, ??????????? ??????? ????????? ????????????, ???????, ???? ??????, ?????????????????, ????? ??????????? ??? ?????????, ?????? ???????? ??????? ??????????? ??? ?????-???? ???????????? ??????????? ???? ??? ?? HRC58- HRC62 ??, ????? ???????, ??? ????? ?????????? ??? ???????? ????????.

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