Which 20th century battleship featured artillery with a specially reinforced barrel and steam turbine propulsion?
Built-up gun A built-up gun is artillery with a specially reinforced barrel. An inner tube of metal stretches within its elastic limit under the pressure of confined powder gases to transmit stress to outer cylinders that are under tension. Concentric metal cylinders or wire windings are assembled to minimize the weight required to resist the pressure of powder gases pushing a projectile out of the barrel. Built-up construction was the norm for guns mounted aboard 20th century Dreadnoughts and contemporary railway guns, coastal artillery, and siege guns through World War II.
B-2LM "B-2LM" (Russian: "Б-2ЛМ" ) is a 130 mm two-gun naval artillery turret, based on the "B-13" ("Б-13") gun. Production started in 1939. "B-2LM" was established on several Soviet ships, including the destroyer leader Tashkent. However, it had a relatively low rate of fire and had a maximum elevation of 45 degrees making it incapable of anti-aircraft fire.