最好，活动板和滑动件也构成单一结构部件。

Advantageously, the mobile plate and the slide also constitute a single structural element.

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眼镜鼻梁架上的手动滑动件通过调整膜片形状来调节焦距。

A manual slider on the bridge of the eyeglasses adjusts the focus by changing the shape of the membrane.

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可用一滑动控制块把滑动件相对针背升降到各钩尖端位置上。

To raise and lower the slide to the various positions of the hook tips relative to the needle back, a sliding control block may be provided.

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