Six The sponge electrode is then put in a vacuum arc furnace for melting. In this particular water-cooled, copper container, An electrical arc is used to soften the sponge electrode to variety an ingot. The term chemical engineer was in general use by about 1900. Despite its emergence in regular https://copper-bending-machine92479.blogtov.com/16321638/aerogel-blanket-no-further-a-mystery