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发明名称	DRILL BIT
摘要
申请公布号	CA647079(A)	申请公布日期	1962.08.21
申请号	CAD647079	申请日期
申请人	HYCALOG	发明人	DANIEL J. GRADY
分类号		主分类号
代理机构		代理人
主权项
地址

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