螺叶后倾 rake of blade

螺叶]歪斜角度 skew angle

窄梢螺叶 narrow-tipped blade

松叶笠螺 Cellana nigrolineata ; nigrolineata

螺叶剖面弦 propeller blade chord

螺叶参考线 blade reference line

螺旋红叶 Helicoradian ; Helicordriving instructora new good ; Helicordriving instructora helpful ; Helicordriving instructorsome kind of

螺旋叶片 helical blade ; helicallobe ; sp iral blade

螺旋桨叶 screw blade ; Propeller Blade