这是用于电池充电器和类似的应用程式，从20 年代，直到低成本固态整流器最初的金属整流器取代它。
It was useful for battery chargers and similar applications from the 1920s until low-cost solid-state rectifiers supplanted it.
这是用于电池充电器和类似的应用程式，从20 年代，直到低成本固态整流器最初的金属整流器取代它。
It was useful for battery chargers and similar applications from the 1920s until low-cost solid-state rectifiers supplanted it.
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