Improvements in and relating to electric valve converting apparatus,申请号GB19370018663-传众专利搜索

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发明名称	Improvements in and relating to electric valve converting apparatus
摘要
申请公布号	GB498474(A)	申请公布日期	1939.01.05
申请号	GB19370018663	申请日期	1937.07.05
申请人	THE BRITISH THOMSON-HOUSTON COMPANY LIMITED	发明人
分类号	H02M1/04	主分类号	H02M1/04
代理机构		代理人
主权项
地址

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