每个组可以包括多项项目，例如文本，图像和按钮等。

Each group can contain multiple items, such as texts, images, and buttons.

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以OMRON CPM1A为例，介绍了用模拟输入电位器、拨码开关和按钮等方法改变定时器的设定值。

Take OMRON CPM1A as an example, the changing setting value methods in which we use analog input potentiometer, dial switch and push-switch are introduced.

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这些角色包括按钮、链接和树等。

These roles include button, link, tree, and so on.

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