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公开(公告)号：US3513938A
公开(公告)日：1970-05-26
申请号：US3513938D
申请日：1969-06-02
Applicant: IBM
Inventor： BUEHNER WILLIAM L , GREER DONALD L , MCCORNACK RICHARD W , O'BRIAN PAUL L , SIMPSON HENRY W
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