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公开(公告)号:CA790999A
公开(公告)日:1968-07-30
申请号:CA790999D
Applicant: IBM
Inventor: WILMER RICHARD K
公开(公告)号:CA764740A
公开(公告)日:1967-08-08
申请号:CA764740D
公开(公告)号:CA756386A
公开(公告)日:1967-04-11
申请号:CA756386D