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Application filed by Г.В. МолчановfiledCriticalГ.В. Молчанов
Priority to SU455ApriorityCriticalpatent/SU70686A1/en
Application grantedgrantedCritical
Publication of SU70686A1publicationCriticalpatent/SU70686A1/en
Устройство дл свинчивани с применением зубчатой передачи и развинчивани бурильных труб от двигател дл вращени ключа.A device for screwing using a gear and unscrewing the drill pipe from the engine to rotate the key.
SU455A1945-04-171945-04-17
Device for screwing and unscrewing drill pipes
SU70686A1
(en)