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公开(公告)号：US3235674A
公开(公告)日：1966-02-15
申请号：US20648962
申请日：1962-06-29
Applicant: ERICSSON TELEFON AB L M
Inventor： BERTIL MIRSTAM JOHN GUNNAR
IPC: H04M1/03
CPC classification number: H04M1/03
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