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公开(公告)号：US2748937A
公开(公告)日：1956-06-05
申请号：US27462252
申请日：1952-03-03
Applicant: GEN ELECTRIC
Inventor： CASLER ADRIEN F , ZIMMERMAN BERNARD A
IPC: G01B5/10
CPC classification number: G01B5/10
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