WELL DRILLING METHOD AND APPARATUS,申请号CA19750229179-传众专利搜索

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发明名称	WELL DRILLING METHOD AND APPARATUS
摘要
申请公布号	CA1021689(A)	申请公布日期	1977.11.29
申请号	CA19750229179	申请日期	1975.06.12
申请人	DU CHARME, LEON	发明人	JACKSON, JOHN G.
分类号		主分类号
代理机构		代理人
主权项
地址

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