采用机械结构传动，上滚轮可与机器同步运转。

Upper feed roller is driven simultaneously by the mechanical transmission mechanism.

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上滚轮座可掀式设计，方便滚轮的清洁与保养；

The head pulley place may raise the type design, the side Then hoop clean and maintenance;

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用户也能通过笔记本屏轴上的一个滚轮来进行控制。

You can also control it with a wheel built into the hinge.

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