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。
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。
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