controllable pitch fan

例句：

1. 1. Thiscontrollable pitch fan is perfect forsummer evenings.
   这款可控制风速的风扇非常适合夏季晚上。
2. 2. The adjustablespeed controllable pitchfan makes it easy to adjustthe airflow.
   这款可调节速度的可控制风速风扇使调整气流变得容易。
3. 3. The controllable pitch fanhas a remote control, making it convenientto operate.
   这款可控制风速的风扇配有遥控器，操作起来非常方便。