APPARATUS FOR FORMING SLIT IN ROCK AND CONCRETE SURFACE,申请号US19900543832-传众专利搜索

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发明名称	APPARATUS FOR FORMING SLIT IN ROCK AND CONCRETE SURFACE
摘要
申请公布号	US5111801(A)	申请公布日期	1992.05.12
申请号	US19900543832	申请日期	1990.07.12
申请人	KATOH, YUTAKA	发明人	KATOH, YUTAKA
分类号	E21B7/02;E21B7/00;E21B15/00;E21B19/08;E21C25/58;E21C27/00;E21C37/24	主分类号	E21B7/02
代理机构		代理人
主权项
地址

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