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公开(公告)号：US2680186A
公开(公告)日：1954-06-01
申请号：US9854849
申请日：1949-06-11
Applicant: WESTINGHOUSE ELECTRIC CORP
Inventor： PRIDMORE THOMAS C , NAGEL GEORGE W
IPC: G05D23/24
CPC classification number: G05D23/2453
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