METHOD OF SHAFT EXCAVATION CONSTRUCTION AND SHELL OPEN-CLOSE TYPE DRILLING BUCKET,申请号JP19870201843-传众专利搜索

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发明名称	METHOD OF SHAFT EXCAVATION CONSTRUCTION AND SHELL OPEN-CLOSE TYPE DRILLING BUCKET
摘要
申请公布号	JPS6448987(A)	申请公布日期	1989.02.23
申请号	JP19870201843	申请日期	1987.08.14
申请人	HARADA KENSETSU:KK;HITACHI CONSTR MACH CO LTD	发明人	HARADA KATSUHIKO;KUSUMI HIROSHI
分类号	E21B11/04	主分类号	E21B11/04
代理机构		代理人
主权项
地址

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