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
电力工人将它用作涂料，隔离缠绕在
起线圈，还将注满了紫胶
紧制成单独绝缘物。
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.
早期电力工人将它用作涂料，隔离缠绕在起线圈，还将注满了紫胶紧制成单独绝缘物。
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