DRILLING CONTROLLER FOR BOTTOM WIDENABLE EARTH DRILL,申请号JP19950348364-传众专利搜索

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发明名称	DRILLING CONTROLLER FOR BOTTOM WIDENABLE EARTH DRILL
摘要
申请公布号	JPH09165989(A)	申请公布日期	1997.06.24
申请号	JP19950348364	申请日期	1995.12.18
申请人	HITACHI CONSTR MACH CO LTD	发明人	AJIRO SHUICHI
分类号	E21B11/00;(IPC1-7):E21B11/00	主分类号	E21B11/00
代理机构		代理人
主权项
地址

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