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Application filed by Frantisek Hasil, Vlasta Ruzickova, Antonin Bolek, Karel VavricekfiledCriticalFrantisek Hasil
Priority to CS212074ApriorityCriticalpatent/CS189131B1/cs
Publication of CS189131B1publicationCriticalpatent/CS189131B1/cs
CS212074A1974-03-251974-03-25Method of production of steel profiles with the closed diameter with the coating on the outer and inner side
CS189131B1
(en)