Украинский Государственный Научно-Исследовательский И Проектно-Конструкторский Институт Горной Геологии, Геомеханики И Маркшейдерского Дела
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Priority to UAU200907019UpriorityCriticalpatent/UA46525U/en
Publication of UA46525UpublicationCriticalpatent/UA46525U/en
A method for protection of openings of coal mines relates to mining industry and can be used at designing, penetration and protection of openings of coal mines.
UAU200907019U2009-07-062009-07-06Method for protection of openings of coal mines
UA46525U
(en)
Lock for chain connecting link, especially the chain for mining machinery and equipment and a key to the lock for chain connecting link, especially the chain for mining machinery and equipment