half-revolution balde propeller
propeller shaft revolution indicator
revolution speed of propeller
Electric motor revolution and connter revolution
engine revolution counter [= revolution counter]
a propeller configuration
accelerating ducted propeller
accelerating propeller noise
adjustable (blade) propeller
adjustable blade propeller pump
adjustable blade propeller runner
adjustable pitch propeller
可调螺距螺旋桨
变距螺桨
调距螺旋桨
可掂螺旋桨
可变螺距螺旋桨
变距推进器
可调距螺桨
可调整螺距螺旋桨
调距推进器
adjustable propeller system
aerial propeller vessel
Aerocraft model test with propeller