METHOD OF PROTECTION CONSTRUCTION OF PICKUP RESERVOIR IN BOWL-SHAPED BIT FOR EXCAVATING CABLE SYSTEM WELL,申请号JP19860146103-传众专利搜索

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发明名称	METHOD OF PROTECTION CONSTRUCTION OF PICKUP RESERVOIR IN BOWL-SHAPED BIT FOR EXCAVATING CABLE SYSTEM WELL
摘要
申请公布号	JPS634192(A)	申请公布日期	1988.01.09
申请号	JP19860146103	申请日期	1986.06.24
申请人	KASUGA SAKUSEN KK	发明人	ITO KOJIRO
分类号	E21B1/04;E21B1/00	主分类号	E21B1/04
代理机构		代理人
主权项
地址

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