no-wind position indicator

例句：

1. 1. The no-wind position indicator is used to indicatethe wind direction at a given location.
   无风位置指示器用于指示给定位置的风向。
2. 2. The no-wind position indicatorwas designed to help pilots avoid collisions in bad weather conditions.
   无风位置指示器被设计来帮助飞行员在恶劣天气条件下避免碰撞。
3. 3. The no-wind position indicator canbe used to monitor the windspeed and direction at any given location.
   无风位置指示器可用于监测任何给定位置的风速和方向。