Type MYG Varistors are made of semiconductor ceramic materials composed mainly of zincoxides. They have non-linear resistance that changes as a function of applied voltage.
型压敏电阻器是以氧化锌为主要原料制造的半导体陶瓷元件，其电阻值随施加电压的变化而呈非线性变化。
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Type MYGJ varistors are made of semiconductor ceramic material composed mainly of zincoxides. They have non-linear resistance that changes as a function of applied voltage.
MYGJ高能型压敏电阻器是以氧化锌为主要原料的半导体陶瓷元件，其电阻值随施加电压的变化而变化。
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At the moment oxides of metals such as zinc and copper seem to be the favourites, but tiny tubes made of carbon are also being explored.