Rückschlagventil für Kraftdrehkopf,申请号DE20026001146T-传众专利搜索

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发明名称	Rückschlagventil für Kraftdrehkopf
摘要
申请公布号	DE60201146(T2)	申请公布日期	2005.01.20
申请号	DE20026001146T	申请日期	2002.05.20
申请人	HALLIBURTON ENERGY SERVICES, INC.	发明人	SZARKA, DAVID D.
分类号	E21B21/10;E21B34/00;(IPC1-7):E21B21/10	主分类号	E21B21/10
代理机构		代理人
主权项
地址

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