Track rail grinding apparatus,申请号US19380185842-传众专利搜索

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发明名称	Track rail grinding apparatus
摘要
申请公布号	US2197729(A)	申请公布日期	1940.04.16
申请号	US19380185842	申请日期	1938.01.20
申请人	THE PENNSYLVANIA RAILROAD COMPANY	发明人	MILLER ROBERT N.
分类号	E01B31/17	主分类号	E01B31/17
代理机构		代理人
主权项
地址

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