ROTARY DRILL BIT,申请号JP19810189420-传众专利搜索

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发明名称	ROTARY DRILL BIT
摘要
申请公布号	JPS57165591(A)	申请公布日期	1982.10.12
申请号	JP19810189420	申请日期	1981.11.27
申请人	KURISUTENSEN INC	发明人	RICHIYAADO EICHI GURATSUPENDOOFU;GOODON JII SHIRIN;JIYON ESU DEIBISU
分类号	E21B10/00;E21B10/02;E21B10/04;E21B10/44;E21B10/54;E21B10/56;E21B10/567;E21B10/60	主分类号	E21B10/00
代理机构		代理人
主权项
地址

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