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Application filed by Г. Б. Цветное, М. Р. Лейдерваргер , Ю. П. ГришковfiledCriticalГ. Б. Цветное, М. Р. Лейдерваргер , Ю. П. Гришков
Priority to SU1830398ApriorityCriticalpatent/SU434265A1/ru
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Publication of SU434265A1publicationCriticalpatent/SU434265A1/ru