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发明名称	DRILLING METHOD AND APPARATUS
摘要
申请公布号	CA820147(A)	申请公布日期	1969.08.12
申请号	CAD820147	申请日期
申请人	WESTERN MINING CORPORATION LIMITED	发明人	REGINALD J. S. CLAPPISON
分类号		主分类号
代理机构		代理人
主权项
地址

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