Perfectionnements au soudage des rails bout à bout,申请号FRD846306-传众专利搜索

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发明名称	Perfectionnements au soudage des rails bout à bout
摘要
申请公布号	FR846306(A)	申请公布日期	1939.09.14
申请号	FRD846306	申请日期	1938.05.14
申请人		发明人	DELACHAUX
分类号	E01B11/50	主分类号	E01B11/50
代理机构		代理人
主权项
地址

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