?? ???? 20th, ???? 80s, ??? ?????? ???????? ??????? ?????? ?? ??????. ?? ???????? ?????? ?? ?????????? ???? ????? ??????, ?????? ????????? ???? ?????? ????? ?????, ?? ?????? ????? ??????? ???????? ?? ?? ???? ?????? ????? ????, ??? ???? ???? ?? ?????? ??? ??????? ??????? ????????. ???? ??????, ???? ?????? ?? ???????? ?????? ????? ???? ?? ??? ?????? ????? ??????? ????.

????? ???????? ????? ?????? ?????? ???? ???????, ???????, ??????, ????????, ????? ??????? ????????? ?????.?????? ?????? ?? ??? ???? ?????? ????? ??? ?????????. ???????? ???????? ??? ??:

• (1) ????? ?? ??? ???? ????, ???? ?????? ?????? ??? ????.
• (2) ???? ????? ?????? ?? ????, ???? ????? ?? ???.
• (3) ???? ??????, ????, ???? ????? ????, ?????, ????? ??, ???? ???? ????? ?????, ??????, ????? ???.
• (4) ????? ??????? ????? ????? ????? Chamfer ?????, ????? ???????, ????? ?? ???? ?? ??? ???? ?? ????? ???????, ???? ???? ?????, ???? ?????? ??? ????
• (5) ???? ????? ???? ???? ??? ???? ???? ???? ???.

?? ???? ?????? ????? ?? ????????? ?????:

• (1) ???? ?????? ????? ???? ????? ?? ????? ?? ????? ?? ????? ?HRC70, ???? ????? ???? ????? ?? ??????? (???, ??? ????, ???, ??? '.)
• (2) ????? ?????? ?? ?????, ???? ?????? ???? ?????? ??????? ????? ???? ??? ?????? ??? ????? ???.
• (3) ?????? ?????, ??????? ???? ??.
• (4), ?????? ???? ?????, ?????, ????? ????? ????? ?????? ??? ???? ???? ????.
• (5) ???? ?????? ????? ???? ???? ??? ???? ??????? ?????, ??????? ??? ??? ?? ???? ???? ??????.
• (6) ?? ??????. ????, ????, ??????? ?? ????? ?????, ??? ????? ????? ??????.
• (7) ????? ??????? ?????? ???? ??????? ????? ?????? ?????? ????? ??????? ?????

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