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as it was later called) was just a dream. zworykin did not know that others had been studying the idea since the s, or that professor rosing had been working on it in secret since and had made excellent progress. rosing had filed his first patent on a television system in , featuring a very early cathode...
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converted to metallic copper, which allows it to attain forms that can be submitted to further refining, more than % pure, as in copper anode and copper blister. the main application of copper anode is to use it as raw material in the process of electrolytic refining, to produce the electrolytic refined cathode...