ボフォース40mm機関砲
The Bofors 40 mm gun is an anti-aircraft [[autocannon]] that was one of the most popular Allied anti-aircraft systems of [[World War II]].  It was often mounted on ships and came in single, twin, and quadruple configurations.  Land versions were typically towed and had a single gun.

h4. External Links
* "Wikipedia: Bofors 40 mm gun":https://en.wikipedia.org/wiki/Bofors_40_mm_gun
bofors 40 mm gun