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.
With a bread knife Miss Martha made a deep slash in each of the stale loaves, inserted a generous quantity of butter, and pressed the loaves tight again.
割机，气动
度高。
绕在一起的线圈，还将注满了紫胶的纸一层层地
，
后酿造。
后将箔纸烘干、
一块泥土搓成了一根可以盘曲的长条，盘成了一个圆圈，再把它
。
深深地划了一道
，放入大量的黄油，
