axial feed

例句：

1. 1. The machine has an axial screw for fastening the parts together.
   这台机器有一个轴向螺丝，用于将部件固定在一起。
2. 2. The axial force is the force that acts along the axis of a rotating object.
   轴向力是作用在旋转物体轴线上的力。
3. 3. The axial balance of the engine is critical to its performance.
   发动机的轴向平衡对其性能至关重要。