- tungsten carbide insert roller core bit
- колонковое шарошечное долото, оснащенное вставками из карбида вольфрама
English-Russian mining dictionary. В.П. Манышев.
tungsten carbide insert roller core bit
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Drill bit — For the fictional character, see Drill Bit (Transformers). For the cancelled skyscraper nicknamed Drill bit, see Chicago Spire. For the types used in drilling wells, see Well drilling. From top to bottom: Spade, lip and spur (brad point), masonry … 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
