UnderAttack: Turret upgrade has 4 branch.炮塔升级4分支

Turret upgrade has 4 branch.炮塔升级4分支： 1.High speed machine gun. kill normal enemy soldiers. 高速机枪 杀敌人普通兵。 2.Anti Tank. To destroy enemy tank; katusha. 反坦克炮，用于摧毁敌坦克、喀秋莎。 3.Area Damage. 区域伤害炮火，对密集敌人杀伤。 4.Anti Communicate. 电…