PISTON OF SUBMERGED AIR HAMMER FOR WELL DRILLING,申请号SU19915004044-传众专利搜索

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发明名称	PISTON OF SUBMERGED AIR HAMMER FOR WELL DRILLING
摘要
申请公布号	RU1813174(C)	申请公布日期	1993.04.30
申请号	SU19915004044	申请日期	1991.10.02
申请人	FRENKEL BORIS E;KOMAROV VLADIMIR M;KADOMKIN VIKTOR V;GLAZKOV VITALIJ V;DAJBOV SERGEJ V	发明人	FRENKEL BORIS E;KOMAROV VLADIMIR M;KADOMKIN VIKTOR V;GLAZKOV VITALIJ V;DAJBOV SERGEJ V
分类号	E21B4/14;(IPC1-7):E21C3/04;E21C3/24	主分类号	E21B4/14
代理机构		代理人
主权项
地址

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