SHAFT SEALING DEVICE FOR CUTTER OF DRILL BIT,申请号JP19870091610-传众专利搜索

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发明名称	SHAFT SEALING DEVICE FOR CUTTER OF DRILL BIT
摘要
申请公布号	JPS63261092(A)	申请公布日期	1988.10.27
申请号	JP19870091610	申请日期	1987.04.14
申请人	TSUKAMOTO SEIKI KK	发明人	TAKATORI TSUTOMU
分类号	E21B10/22	主分类号	E21B10/22
代理机构		代理人
主权项
地址

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