EXCAVATION DEPTH INDICATOR FOR EARTH DRILL,申请号JP19870088426-传众专利搜索

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发明名称	EXCAVATION DEPTH INDICATOR FOR EARTH DRILL
摘要
申请公布号	JPS63255489(A)	申请公布日期	1988.10.21
申请号	JP19870088426	申请日期	1987.04.10
申请人	NIPPON SHARYO SEIZO KAISHA LTD	发明人	GOSHIMA AKIRA
分类号	E21B47/04	主分类号	E21B47/04
代理机构		代理人
主权项
地址

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