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Application filed by Л. И. Корман , Б. Супоницкий, Всесоюзный Государственный институт проектным, , научно исследовательским работам промышленности, нерудных строительных материаловfiledCriticalЛ. И. Корман , Б. Супоницкий
Priority to SU1784510ApriorityCriticalpatent/SU431284A1/ru
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Publication of SU431284A1publicationCriticalpatent/SU431284A1/ru