Early electrical workers used it as a coating to insulate coils, and molded it into stand-alone insulators by pressing together layers of shellac-impreg-nated paper.

早期的电力工人将它用作涂料，隔离缠绕在一起的线圈，还将注满了紫胶的纸一层层地压紧制成单独的绝缘物。

As both insulator and energy storage media, de-ionized water combines the advantages of high relative permittivity(is about 80), self repairability, low cost and ease of handling.

水介质具有高的相对介电常数(约80),而且具有自我恢复的能力,在脉冲功率系统中被广泛应用。

The characteristic, structure, raw materials, equipment, process, cost and applications of arched colour plated roofing are introduced. The foams act as insulator, seal and waterproofer in roofing.

简要介绍了用泡沫塑料保温、密封、防水的拱彩钢屋面的特点、构造、材料、设备、施工工艺、生产成本和应用。