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2024-10-11

????????? ???????? ??????? ???? ????? 40Cr ?????? ??????? ?????, ?????? ???? ???????, ??????? ??? ????????? ?????? ???????? HRC30-35, ???? ??????? ??? ??????? ??????, ??? ????? ??????? ???????? ????????? ????? ???? ????????? ?????, ??????? ??????? ????????, ???? ?????; ???????? ?????? ???? |

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