Improvements in or relating to impact drilling apparatus incorporating a flushing action,申请号GB19600013686-传众专利搜索

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发明名称	Improvements in or relating to impact drilling apparatus incorporating a flushing action
摘要
申请公布号	GB911168(A)	申请公布日期	1962.11.21
申请号	GB19600013686	申请日期	1960.04.19
申请人	PIERRE GROSPAS	发明人
分类号	E21B4/06;E21B11/04;E21B21/00;E21B27/00	主分类号	E21B4/06
代理机构		代理人
主权项
地址

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