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1.发明专利
公开(公告)号：CA836651A
公开(公告)日：1970-03-10
申请号：CA836651D
Applicant: IBM
Inventor： SIMS DONALD E , DEGEORGE PETER J , ROSS ROGER F
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公开(公告)号：CA767288A
公开(公告)日：1967-09-12
申请号：CA767288D
Applicant: IBM
Inventor： STEWART JOSEPH R , THURMOND RAY H , MCDONALD WILLIAM L , DEGEORGE PETER J
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