Down-the-Hole Rock Drills,申请号GB19670045850-传众专利搜索

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发明名称	Down-the-Hole Rock Drills
摘要
申请公布号	GB1180429(A)	申请公布日期	1970.02.04
申请号	GB19670045850	申请日期	1967.10.06
申请人	THOS. BARLOW AND SONS LIMITED	发明人
分类号	E21B4/14;E21B21/00	主分类号	E21B4/14
代理机构		代理人
主权项
地址

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