| 摘要 |
FIELD: civil engineering, ship building, aircraft construction, automobile and tractor industry branch, geology, other branches of national economy, possibly working of concrete, ferroconcrete, bricks, polymeric composition materials, carbon-reinforced plastics, boron-containing plastics, glass-reinforced plastics, natural stones, honeycomb panels, asbestos-cement and other non-metallic materials, tools for removing deposit from inner surfaces of pipelines or different vessels. ^ SUBSTANCE: tool includes cylindrical housing with outer and inner augers in its lateral surfaces, cutting portion and stem. Augers along their whole height are flush mounted in lateral cutting portion of crown. Pitch value of augers is determined according to given mathematical relation. ^ EFFECT: enhanced strength of tool, improved quality and efficiency of working. ^ 1 ex, 2 tbl, 2 dwg |
