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Application filed by Jan Ing Sobola, Oldrich Ing CechfiledCriticalJan Ing Sobola
Priority to CS633485priorityCriticalpatent/CZ278410B6/en
Publication of CS8506334A1publicationCriticalpatent/CS8506334A1/en
Publication of CZ278410B6publicationCriticalpatent/CZ278410B6/en