DEVICE FOR ENLARGING HOLE,申请号JP19780092154-传众专利搜索

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发明名称	DEVICE FOR ENLARGING HOLE
摘要
申请公布号	JPS5519370(A)	申请公布日期	1980.02.12
申请号	JP19780092154	申请日期	1978.07.28
申请人	TONE BORING CO	发明人	HAMAMURA HIROYUKI;KAWASAKI HIROYUKI
分类号	E21B10/32;E21B10/26	主分类号	E21B10/32
代理机构		代理人
主权项
地址

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