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公开(公告)号：US2997540A
公开(公告)日：1961-08-22
申请号：US5330860
申请日：1960-08-31
Applicant: GEN DYNAMICS CORP
Inventor： ERTMAN ROBERT J , IRVING SPERLING , WALKER WATSON F
IPC: H04L1/08
CPC classification number: H04L1/08
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