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Application filed by Kjell HaakedalfiledCriticalKjell Haakedal
Priority to NO885358ApriorityCriticalpatent/NO885358D0/en
Publication of NO885358D0publicationCriticalpatent/NO885358D0/en
NO885358A1988-12-011988-12-01
HYDRAULIC STRUCTURE DEVICE FOR AA REGULATE / CONTROL THE GAS CURRENT WHEN DRAWING GAS FROM A GROUND GAS EXHAUST.
NO885358D0
(en)