Mining machine having adjustable head,申请号US19590861549-传众专利搜索

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发明名称	Mining machine having adjustable head
摘要
申请公布号	US3077342(A)	申请公布日期	1963.02.12
申请号	US19590861549	申请日期	1959.12.23
申请人	JOY MANUFACTURING COMPANY	发明人	BALL CHARLES F.
分类号	E21C31/10	主分类号	E21C31/10
代理机构		代理人
主权项
地址

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