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    2019-8-20 14:20:51       686

         壬HB80

    (1)50δм絶

    (2)мк

    (3)м1裬仯仯

    W18Cr4VYG8YT14ro=2530o=810o'=68kr=3575kr'=515=03005尘尘015尘尘м1520мЩмvo=50mminap=3mm6mmf=O35mmr04mmrvo=60mmin80mminap=01mm04mmf=01 mmr

    мЧ(2)мγСм

           9989990102()

    b=180280 MPa

    a=100170 MPa

    =3050

    =7080

    áко豸

     

       
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    6 á
    201811

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