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公开(公告)号：CA868011A
公开(公告)日：1971-04-06
申请号：CA868011D
Applicant: IBM
Inventor： DERR DONALD B , NEFF GORDON W , SAMBUCETTI CARLOS J
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公开(公告)号：CA672000A
公开(公告)日：1963-10-08
申请号：CA672000D
Applicant: IBM
Inventor： YOURKE HANNON S , NEFF GORDON W
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