APPARATUS FOR DETECTING NUMBER OF ROTATIONS OF BIT OF TURBO DRILL,申请号JP19850187564-传众专利搜索

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发明名称	APPARATUS FOR DETECTING NUMBER OF ROTATIONS OF BIT OF TURBO DRILL
摘要
申请公布号	JPS6250588(A)	申请公布日期	1987.03.05
申请号	JP19850187564	申请日期	1985.08.27
申请人	ISHIKAWAJIMA HARIMA HEAVY IND CO LTD	发明人	YAMAZAKI SHOJI
分类号	E21B4/02;E21B44/00	主分类号	E21B4/02
代理机构		代理人
主权项
地址

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