An electrical heater for railway points,申请号GB19550020821-传众专利搜索

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发明名称	An electrical heater for railway points
摘要
申请公布号	GB771722(A)	申请公布日期	1957.04.03
申请号	GB19550020821	申请日期	1955.07.19
申请人	ALFONS ANDREAS LEICHT	发明人
分类号	E01B7/24	主分类号	E01B7/24
代理机构		代理人
主权项
地址

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