acute angle crank

例句：

1. 1. The car's steering wheel has an acute angle to the road.
   汽车的方向盘与道路成锐角。
2. 2.The engineer used an acute angle crank to adjust the gears.
   工程师使用锐角曲柄来调整齿轮。
3. 3.The aeroplane was designed with an acute angle crank for better maneuverability.
   飞机设计了锐角曲柄以提高机动性。