Traverse de chemin de fer en béton armé, et procédé pour sa fabrication,申请号FRD1050470-传众专利搜索

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发明名称	Traverse de chemin de fer en béton armé, et procédé pour sa fabrication
摘要
申请公布号	FR1050470(A)	申请公布日期	1954.01.07
申请号	FRD1050470	申请日期	1951.12.06
申请人	DYCKERHOFF & WIDMANN KOMMANDITGESELLSCHAFT	发明人
分类号	B28B23/22;E01B3/34	主分类号	B28B23/22
代理机构		代理人
主权项
地址

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