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公开(公告)号：US3181160A
公开(公告)日：1965-04-27
申请号：US11175461
申请日：1961-05-22
Applicant: THOMSON HOUSTON COMP FRANCAISE
Inventor： SERGE PICHAFROY
IPC: G01S13/44
CPC classification number: G01S13/4445
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