BORE HOLE AIRHAMMER AND ANVIL BIT,申请号GB19760014032-传众专利搜索

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发明名称	BORE HOLE AIRHAMMER AND ANVIL BIT
摘要
申请公布号	GB1495875(A)	申请公布日期	1977.12.21
申请号	GB19760014032	申请日期	1976.04.07
申请人	BAKERDRILL INC	发明人
分类号	E21B4/14;(IPC1-7):E21B1/06	主分类号	E21B4/14
代理机构		代理人
主权项
地址

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