double deflection indicator tube

例句：

1. 1. The double deflection indicator tube is used to measure the angle of a missile's flight path.
   双偏转指示管用于测量导弹飞行路径的角度。
2. 2. The double deflection indicator tube was designed to improve accuracy in radar detection.
   双偏转指示管设计用来提高雷达探测的准确性。
3. 3. The double deflection indicator tube was used to detect the presence of an enemy aircraft in the area.
   双偏转指示管被用来检测该区域是否存在敌机。