短语词组短语left rotor stub shaft 左侧转子短轴rotor -shaft system 转子轴系统rotor r shaft 转子轴tail rotor drive shaft 尾桨传动轴Angle of rotor shaft 风轮仰角Rotor shaft length 转子轴长rotor shaft hatch 转子轴孔ROTOR SHAFT SEAL 轴封 返回 rotor shaft