Roving Gun

• 流动火炮

roving gun的用法和样例：

例句

1. The gun on the turret could be swivelled once in a minute.
   炮塔的火炮可在一分钟内旋转一周。
2. As soon as they landed, they made straight for the enemy gun emplacements.
   他们一登陆就向敌人的火炮阵地猛扑过去。