直流电磁铁是广泛应用的电磁控制元件，PT C元件是具有正温度系数特性的半导体陶瓷热敏电阻。
Direct current electromagnet is extensively used as electromagnet controlling element. PTC element is a ceramic thermistor with positive temperature coefficient.
是一种具有正温度系数的热敏陶瓷材料。
PTCR (positive temperature coefficient of resistance) is a type of temperature sensitive material which possesses positive temperature coefficient.
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