In this case, there are a limited number of switch CARDS that can handle both the high voltage and the high current signals.
在这种情况下，则仅仅有限的开关卡既可以处理高压信号，又可以处理大电流信号。
General-purpose switches are usually sufficient for switching the voltage source unless high voltages (>100V) are involved, in which case, high voltage switch cards are necessary.
除了切换高压（>100V）时需要高压开关卡外，通用开关通常足以切换电压源。
General-purpose switches are usually sufficient for switching the voltage source unless high voltages (>100V) are involved, in which case, high voltage switch cards are necessary.
除了切换高压（>100V）时需要高压开关卡外，通用开关通常足以切换电压源。
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