Центральна Науково-Дослідна Лабораторія Виробничого Об'Єднання "Укрнафта"
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Priority to UA4859142ApriorityCriticalpatent/UA9886A/en
Publication of UA9886ApublicationCriticalpatent/UA9886A/en
Lift has in operation string lift pipe with discharge valves and working clutch placed under those with working openings placed in it and gas duct. In the lift pipe additional working openings are provided, those are distributed at whole length in interval of discharge calves and lower than those.
UA4859142A1990-08-151990-08-15Gaslift elevator
UA9886A
(en)