MANUFACTURE METHOD OF ROTARY EXCAVATOR KELLY,申请号JP19900309038-传众专利搜索

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发明名称	MANUFACTURE METHOD OF ROTARY EXCAVATOR KELLY
摘要
申请公布号	JPH04179791(A)	申请公布日期	1992.06.26
申请号	JP19900309038	申请日期	1990.11.15
申请人	DAIDO STEEL CO LTD	发明人	OKUYAMA KAZUMI;TAKEUCHI MIKIO
分类号	E21B17/00	主分类号	E21B17/00
代理机构		代理人
主权项
地址

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