. . . . . . . . "The ZPU (Russian: \u0437\u0435\u043D\u0438\u0442\u043D\u0430\u044F \u043F\u0443\u043B\u0435\u043C\u0451\u0442\u043D\u0430\u044F \u0443\u0441\u0442\u0430\u043D\u043E\u0432\u043A\u0430, meaning \"anti-aircraft machine gun mount\") is a family of towed anti-aircraft gun based on the Soviet 14.5 mm KPV heavy machine gun. It entered service with the Soviet Union in 1949 and is used by over 50 countries worldwide.Quadruple (ZPU-4), two double- (ZPU-2 and ZU-2) and single-barreled (ZPU-1) versions of the weapon exist."@en . . . . . . . "ZPU Anti-aircraft Gun"@en . . . . . .