DOPPELT WIRKENDER BESCHLEUNIGER FÜR HYDRAULISCHE SCHLAGSCHIEBER,申请号DE19926017956T-传众专利搜索

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发明名称	DOPPELT WIRKENDER BESCHLEUNIGER FÜR HYDRAULISCHE SCHLAGSCHIEBER
摘要
申请公布号	DE69217956(T2)	申请公布日期	1997.06.12
申请号	DE19926017956T	申请日期	1992.07.02
申请人	DAILEY PETROLEUM SERVICES CORP., CONROE, TEX., US	发明人	EVANS, ROBERT, W., MONTGOMERY, TX 77356, US
分类号	E21B31/107;E21B17/07;E21B31/113;(IPC1-7):E21B31/107	主分类号	E21B31/107
代理机构		代理人
主权项
地址

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