炮艇是一款军事武器，概念源自于侧射武器系统概念。炮艇机的概念源自于侧射武器系统概念，而后者早在一战时期就出现了。 当时就有安装了旋转枪架(机枪可以在枪架上旋转向侧面开火)的战斗机在各国空军中服役。
坎贝尔上尉命令舵手向炮艇驶去。
Lieutenant Campbell ordered the man at the wheel to steer for the gunboat.
福克斯说，可以派遣少数军舰前往，以阻止南方炮艇的干扰。
Fox said a few warships could be sent to prevent southern gunboats from interfering.
萨姆特堡四面被南方的炮火所包围，南方的炮艇守卫着这座港口。
The fort was surrounded by southern artillery. Southern gunboats guarded the harbor.
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