IMPROVEMENTS RELATING TO BORING TOOLS,申请号ZA19780006817-传众专利搜索

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发明名称	IMPROVEMENTS RELATING TO BORING TOOLS
摘要
申请公布号	ZA7806817(B)	申请公布日期	1979.10.31
申请号	ZA19780006817	申请日期	1978.12.05
申请人	CEMENTATION GROUND ENG LTD	发明人	WINDER R;DUNN J
分类号	E21B;E21C	主分类号	E21B
代理机构		代理人
主权项
地址

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