在最佳工作条件下，给出了集电极电流和集电极——发射极电压波形。

The waveforms of the collector current and collector-emitter voltage are also determined under the optimum operation condition.

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晶体开关管的集电极与发射极间的电压取决于电网电压。

The collector voltage of the switching transistor is determined by the voltage of the power network.

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