Preform element faced with superhard material,申请号GB19980011560-传众专利搜索

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发明名称	Preform element faced with superhard material
摘要
申请公布号	GB2327692(A)	申请公布日期	1999.02.03
申请号	GB19980011560	申请日期	1998.06.01
申请人	* CAMCO INTERNATIONAL	发明人	TERRY RICHARD * MATTHIAS
分类号	E21B10/56;E21B10/573;(IPC1-7):E21B10/56	主分类号	E21B10/56
代理机构		代理人
主权项
地址

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