WITH ANNULAR FIED PRESSURE CONTROLLED FLAP VALVE BUILT IN THE BORING BAR,申请号HU1977KO02879-传众专利搜索

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发明名称	WITH ANNULAR FIED PRESSURE CONTROLLED FLAP VALVE BUILT IN THE BORING BAR
摘要
申请公布号	HU177841(B)	申请公布日期	1981.12.28
申请号	HU1977KO02879	申请日期	1977.10.05
申请人	MAGYAR SZENHIDROGENIPARI KUTATO-FEJLESZTOE INTEZET,HU;KOEOLAJKUTATO VALLALAT,HU	发明人	HEGYI,FERENC,HU;MADAR,GEZA,HU;MADAR,LASZLO,HU;RAKAR,GEZANE,HU
分类号	E21B33/00;F16K15/08;(IPC1-7):E21B33/00	主分类号	E21B33/00
代理机构		代理人
主权项
地址

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