DOWNHOLE HAMMER WITH INTERMEDIATE PRESSURE CHAMBER,申请号AU19860056523-传众专利搜索

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发明名称	DOWNHOLE HAMMER WITH INTERMEDIATE PRESSURE CHAMBER
摘要
申请公布号	AU568975(B2)	申请公布日期	1988.01.14
申请号	AU19860056523	申请日期	1986.04.23
申请人	REAR, I.G.,	发明人	IAN GRAEME REAR
分类号	E21B4/14	主分类号	E21B4/14
代理机构		代理人
主权项
地址

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