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公开(公告)号：US3034782A
公开(公告)日：1962-05-15
申请号：US69720357
申请日：1957-11-18
Applicant: IBM
Inventor： WEIDENHAMMER JAMES A , WROBLEWSKI EDWARD J , NORMAN WATKINS , CULVEYHOUSE STANLEY J , LOUIS SERENATE
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