Set up the new screen using Double dispatch.
使用双重分发设置新屏幕。
If you double-click the new class glyph, you see a screen like this.
如果双击这个新类图标，就会看到屏幕变成如下所示。
Love hate feeling sorrow can't say, double screen have thousands knot.
爱恨情愁不能说，双丝网有千千结。
The screen are two kinds, single layer or double layer.
筛面可分单层或双层筛网。
The screen are two kinds, single layer or double layer.
筛面可分单层或双层筛网。
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