Cast-steel railway crossing pieces,申请号US19670633003-传众专利搜索

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发明名称	Cast-steel railway crossing pieces
摘要
申请公布号	US3378683(A)	申请公布日期	1968.04.16
申请号	US19670633003	申请日期	1967.04.24
申请人	ACIERIES DE PARIS ET D'OUTREAU, SOCIETE ANONYME	发明人	PERROT ROBERT
分类号	E01B7/12	主分类号	E01B7/12
代理机构		代理人
主权项
地址

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