👉 A trivoltine is a type of electric appliance that was popular in the 1920s and 1930s. It consisted of an overhead transformer, which allowed for the conversion of低压交流电（AC）电压转换为高压直流电（DC）。这种转换方式使得家用电器可以同时工作在两个相位的电源之间，从而节省了电力。此外，它还具有防潮、防水和防腐蚀的功能，非常适合于潮湿或有
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