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Application filedfiledCritical
Priority to CS87275ApriorityCriticalpatent/CS175129B1/cs
Priority to CH144176Aprioritypatent/CH614498A5/xx
Priority to DE19762604931prioritypatent/DE2604931C2/de
Priority to GB505976Aprioritypatent/GB1536363A/en
Publication of CS175129B1publicationCriticalpatent/CS175129B1/cs