齿轮段也有输入轴和输出轴，它必须吧动力传递给驱动轮。
The gear section also has the input shaft and the output shaft needed to transmit power to the drive wheels.
为确保高质素精致齿轮的生产，我们亦不段提高制作技术。
To ensure the production of top quality precision gears, our manufacturing techniques are upgraded constantly.
并且证明，法面双圆弧齿轮的每一段端面齿廓都是对应椭圆曲线段在相对运动中的包络曲线。
Moreover, the extreme shape of the normal double circle gearing proves to be the involved curve of the corresponding ellipse.
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