розгар (ерозія, знос) каналу ствола
barrel erosion
erosion-resistant coating
rain-erosion damage
spark-erosion machining
axis of the bore
barrel bore wear level
bore
bore brush (swab)
bore cleaner
bore diameter
centerline of the bore
extended range full bore (ERFB)
helix along the axis of the bore
muzzle bore sight
rifle bore cleaner
smallbore (small-bore)
smooth-bore (smoothbore)
smooth-bore artillery
bore guide
big bore
bore corner
bore gauge
bore leading
bore obstruction
bore premature
bore sight
bore sighter
bore surface
bore-out-of-round
bore-safe fuze
bore-sighting telescope
breech end of bore