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公开(公告)号：US3370238A
公开(公告)日：1968-02-20
申请号：US49384065
申请日：1965-10-07
Applicant: ERICSSON TELEFON AB L M
Inventor： EVERT LAMPA OSKAR
CPC classification number: H03K5/05 , H03K5/156 , H03M5/18 , H04L25/242
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