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Hi. Building a Metal Furnace Copper (Cu) is our next video. In this video we have successfully separated copper from ore by furnace, we have improved the air injection system for the furnace. We were looking for copper ore in the stream. Copper Copper (CU) a great turning point in history. It changed the primordial to a new evolution of humanity. The bronze age is quite long and very developed, as a precondition for the iron age (Fe). The melting point of the copper metal is quite fast at 1000 degrees. We will continue to create many weak Copper metal pure enough to melt, creating copper metal tools. Then we will advance to the Iron Age (Fe). We will continue to make the next video on primitive technology and wild survival skills. Subscribe to the channel to keep track of the latest videos. Thank you.