ptc是一种新型的半导体陶瓷材料它的�热效率较高ptc有一个人为设定的温度低于这个温度时其电阻值随温度的升高而变小高于这个温度时其 Template




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tomskiptc是一种新型的半导体陶瓷材料它的�热效率较高ptc有一个人为设定的温度低于这个温度时其电阻值随温度的升高而变小高于这个温度时其 coloring