Record controlled punch
    18.
    发明授权
    Record controlled punch 失效
    记录控制冲孔

    公开(公告)号:US2007391A

    公开(公告)日:1935-07-09

    申请号:US72049534

    申请日:1934-04-13

    Applicant: IBM

    Inventor: BRYCE JAMES W

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