ROTARY CUTTER DRILL,申请号GB19840025520-传众专利搜索

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发明名称	ROTARY CUTTER DRILL
摘要
申请公布号	GB8425520(D0)	申请公布日期	1984.11.14
申请号	GB19840025520	申请日期	1984.10.09
申请人	DRESSER INDUSTRIES INC	发明人
分类号	E21B10/20;E21B10/22	主分类号	E21B10/20
代理机构		代理人
主权项
地址

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