An optical fiber is a dielectric (nonconductor of electricity) waveguide made of glass or plastic.

光纤是一种介（绝缘体）波导的玻璃或塑料。

The study showed that the property of grain triboelectrification relates to grain moisture, friction velocity, dielectric constant and friction material.

研究明，稻谷的摩擦带与稻谷含水率、摩擦速度、稻谷的介常数以及摩擦材料等因素有关。

To raise ozone output of ozonator,it demands that ceramic plate materials for ozonator have good dielectric properties and quite high thermal conductivity.

为了提高臭氧发生器的臭氧产量,要求臭氧发生器用的陶瓷基板材料具有较高的介性能和热导率。

The interelectrode dielectric adopts the polypropylene film with surface coarsening which is easy to impregnate so as to enhance the reliability of high-capacity capacitor.

极间介为易于浸渍的粗化聚丙薄膜，特别提高了大量器的可靠性。

This heating helps to break down weak spots in the dielectric that otherwise might pass through the electrode undetected, only to fail during a later spark or hipot test.

这热量帮助击穿线绝缘较薄的地方﹐否则线材通过极而没有被检测到﹐结果在以后的火花测试和高压绝缘试验将会失效。