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Application filed by Дрогобицький Механічний Технікум, Дрогобычский механический техникум, Ярослав Орест Теофільович Мацюрак, Ярослав Орест Теофилович Мацюрак, Семен Ісаакович Кантор, Семен Исаакович Кантор, Іван Васильович Буряк, Иван Васильевич Буряк, Степан Михайлович Фучило, Володлен Давидович Іцхакін, Володлен Давидович ИцхакинfiledCriticalДрогобицький Механічний Технікум
Priority to UA99010132ApriorityCriticalpatent/UA33195A/en
Publication of UA33195ApublicationCriticalpatent/UA33195A/en
With special drill heads destruction of rock of face is performed with four-tooth multi-level circular washers (cuts) and with and crown with blowing face with compressed air. 1
UA99010132A1999-01-101999-01-10Method for rotary drilling and drill head
UA33195A
(en)
Method and device for grinding buttons of a rock drilling bit and a flushing head for supplying flushing medium when grinding buttons of a rock drilling bit