图4电路只需要一对外部器件，用SSR实现输出过电压保护。

The circuit in Figure 4 requires only a couple of external components to use an SSR for output-overvoltage protection.

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图4电路只需要一对外部器件，用SSR实现输出过电压保护。

The circuit in Figure 4 requires only a couple of external components to use an SSR for output-overvoltage protection.

youdao