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Priority to CS293670ApriorityCriticalpatent/CS148501B1/cs
Priority to AT718670Aprioritypatent/AT304393B/de
Priority to CH536371Aprioritypatent/CH539153A/de
Priority to JP2616071Aprioritypatent/JPS5329745B1/ja
Priority to GB1149771Aprioritypatent/GB1344737A/en
Publication of CS148501B1publicationCriticalpatent/CS148501B1/cs