涡轮通过减速齿轮转动，向高压轴施加扭矩，从而驱动发动机和飞机附件。

AThe turbine rotates by a reduction gear gives tolerance to the HP shaft, so it can drive the engine and the aircraft accessories.

B The turbine turning through a reduction gear, applies a torque to the HP shaft, thus driving the engine and the aircraft components.

CThe turbine turning through a reduction gear, applies a torque to the HP shaft, thus driving the engine and the aircraft accessories.