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公开(公告)号：US3302998A
公开(公告)日：1967-02-07
申请号：US12855861
申请日：1961-08-01
Applicant: IBM
Inventor： COMPTON DINSDALE M J , LYONS VINCENT J , MCDADE PATRICIA J
IPC: C30B25/08
CPC classification number: C30B25/08 , Y10S420/903
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