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公开(公告)号：US2488277A
公开(公告)日：1949-11-15
申请号：US3301848
申请日：1948-06-15
Applicant: GEN ELECTRIC
Inventor： FALK CHARLES J , FAIRLEY RICHARD K , SHORT THOMAS T
IPC: G01B7/04
CPC classification number: G01B7/046
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