phase rotation indicator

例句：

1. 1. The phase rotation indicator is used to measure the angle between two rotating objects.
   相位旋转指示器用于测量两个旋转物体之间的夹角。
2. 2. The phase rotation indicator can be used to detect and prevent collisions between moving objects.
   相位旋转指示器可用于检测和预防移动物体之间的碰撞。
3. 3. The phase rotation indicator is an essential tool for engineers who work with machinery and equipment.
   相位旋转指示器是工程师们使用机械和设备工作时必不可少的工具。