EARTH-DRILLING APPARATUS,申请号SU19782575077-传众专利搜索

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发明名称	EARTH-DRILLING APPARATUS
摘要
申请公布号	SU754040(A1)	申请公布日期	1980.08.07
申请号	SU19782575077	申请日期	1978.01.31
申请人	ZHIDKOV ALEKSANDR D,SU	发明人	ZHIDKOV ALEKSANDR D,SU
分类号	E21B17/06;(IPC1-7):E21B17/06	主分类号	E21B17/06
代理机构		代理人
主权项
地址

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