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公开(公告)号：US3357254A
公开(公告)日：1967-12-12
申请号：US44556665
申请日：1965-04-05
Applicant: LAB D ELECTRONIQUE ET DE PHYSI
Inventor： ROBERT EVRARD
IPC: G01L21/00
CPC classification number: G01L21/00
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