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公开(公告)号：US3423682A
公开(公告)日：1969-01-21
申请号：US3423682D
申请日：1968-01-30
Applicant: CSF
Inventor： CAUCHOIS JEAN
CPC classification number: H03D1/00 , G01S7/2923 , G01S7/2927 , G01S7/36
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