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6 The Sponge electrode is then put in a very vacuum arc furnace for melting. In this particular water-cooled, copper container, an electric arc is used to soften the sponge electrode to kind an ingot. The remaining two isotopes of silicon type only 7% on the The natural way occurring https://cnc-punching-machine82580.dailyhitblog.com/41240257/the-5-second-trick-for-is-boron-carbide-a-ceramic
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