IMPROVED METHOD AND MEANS FOR DRILLING,申请号AU19910072885-传众专利搜索

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发明名称	IMPROVED METHOD AND MEANS FOR DRILLING
摘要
申请公布号	AU7288591(A)	申请公布日期	1991.05.30
申请号	AU19910072885	申请日期	1991.03.13
申请人	WERNER GIEHL	发明人	WERNER GIEHL
分类号	E21B1/00;E21B10/38;E21B21/12	主分类号	E21B1/00
代理机构		代理人
主权项
地址

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