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公开(公告)号：US3370134A
公开(公告)日：1968-02-20
申请号：US36386564
申请日：1964-04-30
Applicant: ERICSSON TELEFON AB L M
Inventor： OLOF JOHANNESSON NILS , NORMANN TRONSLI SVERRE
IPC: H04B17/40
CPC classification number: H04B17/409
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