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公开(公告)号：US2366721A
公开(公告)日：1945-01-09
申请号：US51584343
申请日：1943-12-27
Applicant: GEN ELECTRIC
Inventor： SAMUEL GABRIELSON
CPC classification number: G01C19/26 , G01C19/44 , Y10T74/1204 , Y10T74/20636
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