EARTH BORING BIT WITH SHEAR COMPRESSION SEAL,申请号GB19860028773-传众专利搜索

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发明名称	EARTH BORING BIT WITH SHEAR COMPRESSION SEAL
摘要
申请公布号	GB2184795(B)	申请公布日期	1988.08.03
申请号	GB19860028773	申请日期	1986.12.02
申请人	HUGHES TOOL COMPANY	发明人	BRUCE HAWLEY * BURR
分类号	E21B10/24;E21B10/22;E21B10/25;F16J15/34;(IPC1-7):F16J15/16	主分类号	E21B10/24
代理机构		代理人
主权项
地址

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