Apparatus for drilling boreholes with explosive charges,申请号US19590855681-传众专利搜索

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发明名称	Apparatus for drilling boreholes with explosive charges
摘要
申请公布号	US3014423(A)	申请公布日期	1961.12.26
申请号	US19590855681	申请日期	1959.11.27
申请人	JERSEY PRODUCTION RESEARCH COMPANY	发明人	JR. LEON HAYNSWORTH ROBINSON,;FRIEDMAN ROBERT H.
分类号	E21B7/00	主分类号	E21B7/00
代理机构		代理人
主权项
地址

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