Orszaagos Koolaj-es Gaazipari Troszt

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Layer-separating device hydraulically anchorable in a well casing
- Patent number 4,146,093
- Issue date Mar 27, 1979
- Koolaj-es Foldgazbanyaszati Ipari Kutato Laboratorium
- Robert Horvath
- E21 - EARTH DRILLING MINING

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