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公开(公告)号：CA846404A
公开(公告)日：1970-07-07
申请号：CA846404D
Applicant: IBM
Inventor： COX CECIL W , MAY FREDERICK T
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公开(公告)号：CA828934A
公开(公告)日：1969-12-02
申请号：CA828934D
Applicant: IBM
Inventor： HORNUNG LOUIS M , COX CECIL W
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