Improvements in and relating to methods of measuring speed variations,申请号GB19310018168-传众专利搜索

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发明名称	Improvements in and relating to methods of measuring speed variations
摘要
申请公布号	GB383302(A)	申请公布日期	1932.11.17
申请号	GB19310018168	申请日期	1931.06.23
申请人	THE BRITISH THOMSON-HOUSTON COMPANY, LIMITED	发明人
分类号	G03B27/46;H05B3/78	主分类号	G03B27/46
代理机构		代理人
主权项
地址

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