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Priority claimed from DE19792900888external-prioritypatent/DE2900888A1/de
Priority claimed from SU802869296Aexternal-prioritypatent/SU974937A3/ru
Application filed by Polyfelt GmbhfiledCriticalPolyfelt Gmbh
Publication of LT2625BpublicationCriticalpatent/LT2625B/lt