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公开(公告)号：US3146313A
公开(公告)日：1964-08-25
申请号：US19901662
申请日：1962-05-31
Applicant: ERICSSON TELEFON AB L M
Inventor： GUNNAR ULIN LARS
IPC: H04M9/10
CPC classification number: H04M9/10
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