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Application filedfiledCritical
Priority to CS423971ApriorityCriticalpatent/CS163418B1/cs
Priority to DE19722224187prioritypatent/DE2224187A1/de
Priority to GB2367272Aprioritypatent/GB1366755A/en
Priority to IT2521572Aprioritypatent/IT956119B/it
Publication of CS163418B1publicationCriticalpatent/CS163418B1/cs