Printing mechanism
    47.
    发明授权
    Printing mechanism 失效
    打印机制

    公开(公告)号:US2111121A

    公开(公告)日:1938-03-15

    申请号:US11713936

    申请日:1936-12-22

    Applicant: IBM

    Inventor: MILLS ALBERT W

    CPC classification number: B41K3/08

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