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.
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.
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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