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公开(公告)号：US3249913A
公开(公告)日：1966-05-03
申请号：US27886763
申请日：1963-05-08
Applicant: CA NAT RESEARCH COUNCIL
Inventor： SMYTH HENRY L R , MAKOW DAVID M , KEAYS STANLEY K
CPC classification number: G10K11/006 , G01S1/72
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