x
uploads/propellor.jpg

propellor n.1.推進者。2.(汽船、飛機的)螺旋槳,推進器;暗輪...

propend

Screw propellor for boat 船用螺旋槳推進器

Rech . flexible shafts for controlling tachometers , propellor regulators , etc . 操縱轉速計和螺旋漿調速器等用撓性軸