You can install a disk in your car, which I would call, then, a flywheel, And you can convert the gravitational potential energy.
可以在车内装个圆盘，可以称之为飞轮，可以转化，重力势能。
Each disk is processed or ground to mold, and assembled into a flywheel with a large axial thickness, thereby storing several kilowatt-hours or more energy.
每个圆盘经过加工或研磨成型并装配成轴向较厚的飞轮，从而存储数千瓦时或更多能量。
Each disk is processed or ground to mold, and assembled into a flywheel with a large axial thickness, thereby storing several kilowatt-hours or more energy.
每个圆盘经过加工或研磨成型并装配成轴向较厚的飞轮，从而存储数千瓦时或更多能量。
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