ENLARGED HEAD FOR EXCAVATION,申请号JP19970023909-传众专利搜索

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发明名称	ENLARGED HEAD FOR EXCAVATION
摘要
申请公布号	JPH10220152(A)	申请公布日期	1998.08.18
申请号	JP19970023909	申请日期	1997.02.06
申请人	NIPPON SHARYO SEIZO KAISHA LTD	发明人	YANAGIHARA KAZUO;NODA EIICHIRO
分类号	E21B10/32;(IPC1-7):E21B10/32	主分类号	E21B10/32
代理机构		代理人
主权项
地址

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