若在转动导管螺旋桨上加装PBCF，其效果更佳。

Attaching it to the shaft of propeller with rotary duct will lead to a better result.

youdao

若在转动导管螺旋桨上加装PBCF，其效果更佳。

Attaching it to the shaft of propeller with rotary duct will lead to a better result.

youdao