propellern.螺旋桨；推进器=propellor.propeller control推进器控制propeller cowling螺旋浆罩propeller windmill螺桨式风车propeller log book推进器记录本propeller skewback人字斜背propeller theories螺旋桨理论propeller governor螺旋桨调速器propeller airplane螺旋桨飞机propeller-driven螺旋桨带动的,螺旋桨带动propeller agitator螺旋桨式搅拌器