Improvements in or relating to five-electrode valves,申请号GB19290024720-传众专利搜索

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发明名称	Improvements in or relating to five-electrode valves
摘要
申请公布号	GB317331(A)	申请公布日期	1930.05.29
申请号	GB19290024720	申请日期	1929.08.13
申请人	SOCIETE DES ETABLISSEMENTS PERICAUD	发明人
分类号	H03D7/10	主分类号	H03D7/10
代理机构		代理人
主权项
地址

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