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Priority to JP6515490UpriorityCriticalpatent/JPH0749413Y2/ja
Publication of JPH0424056UpublicationCriticalpatent/JPH0424056U/ja
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Foerfarande och anordning foer att indikera graensytan mellan en vaetska och en gas som stroemmar efter varandra i ett roersystem, eller en i vaetskan befintlig bubbla.