Perfectionnements apportés aux circuits de voie,申请号FRD825143-传众专利搜索

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发明名称	Perfectionnements apportés aux circuits de voie
摘要
申请公布号	FR825143(A)	申请公布日期	1938.02.24
申请号	FRD825143	申请日期	1937.08.03
申请人	GENERAL RAILWAY SIGNAL COMPANY	发明人
分类号	B61L1/18	主分类号	B61L1/18
代理机构		代理人
主权项
地址

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