于一个形式，通用减光器系开始各个操作于后缘模式，且当侦测一电感负载时而切换至前缘模式。
In one form, the universal dimmer begins each operation in the trailing edge mode and upon detection of an inductive load, switches to leading edge mode.
这个类别除了提供资源元件中简单索引键侦测的通用基底类别外，不提供任何其他功能。
This class provides no functionality except to supply a common base class for simple key detection in resource components.
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