Tunneling machine having rotating cutting bars,申请号US19540456467-传众专利搜索

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发明名称	Tunneling machine having rotating cutting bars
摘要
申请公布号	US2802653(A)	申请公布日期	1957.08.13
申请号	US19540456467	申请日期	1954.09.16
申请人	GOODMAN MANUFACTURING COMPANY	发明人	BUDD ROBERT D.
分类号	E21D9/11	主分类号	E21D9/11
代理机构		代理人
主权项
地址

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