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公开(公告)号：US2583132A
公开(公告)日：1952-01-22
申请号：US73760647
申请日：1947-03-27
Applicant: WESTINGHOUSE ELECTRIC CORP
Inventor： WILLIAM ALTAR , SMITH OTTO J M
CPC classification number: G01B15/025 , G01N23/16
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