- cone-and-blade rock drilling bit
- шарошечно-лопастное буровое долото* * *шарошечно-лопастное буровое долото
Англо-русский словарь нефтегазовой промышленности. 2011.
Англо-русский словарь нефтегазовой промышленности. 2011.
Drilling rig — For a detailed diagram of a Petroleum drilling rig, see List of components of oil drilling rigs. Drilling rig preparing rock blasting … Wikipedia
Hughes Christensen — Hughes Christensen, a division of Baker Hughes Inc., is a large oil and gas drill bit company. Howard Hughes, Sr. founded the company early in the 20th century. His two cone, rolling cutter rock bit whose patent was issued by the US Patent Office … Wikipedia
List of Chinese inventions — A bronze Chinese crossbow mechanism with a buttplate (the wooden components have … Wikipedia
Shotgun — For other uses, see Shotgun (disambiguation). A pump action Remington 870, two semi automatic … Wikipedia