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公开(公告)号：US3418432A
公开(公告)日：1968-12-24
申请号：US42192864
申请日：1964-12-29
Applicant: IBM
Inventor： BOGGS JR RAYMOND R , LOCKLAR HENRY C , ELWOOD WEST L
IPC: H04M11/10
CPC classification number: H04M11/10
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