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公开(公告)号：US3174102A
公开(公告)日：1965-03-16
申请号：US19897962
申请日：1962-05-31
Applicant: IBM
Inventor： BERZINSKI JR LEO C , BYMERS RONALD J , RUOFF CARL E
IPC: H04M3/50
CPC classification number: H04M3/50
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