QF 2-pounder naval gunとは 意味・読み方・使い方

The 2-pounder gun, officially designated the QF 2-pounder (QF denoting "quick firing") and universally known as the pom-pom, was a 1.575 inch (40 mm) British autocannon, used famously as an anti-aircraft gun by the Royal Navy. The name came from the sound that the original models make when firing. Although these were 2-pounder guns, in that they fired a projectile with a weight of 2 pounds, they were not the same gun as that used by the British Army as an anti-tank weapon or to equip British tanks and certain armoured cars.