Welcome to visit us!

[email protected]
logo mlogo

Which Of The Following Is An Important Ore Of Copper

We are here for your questions anytime 24/7, welcome your consultation.

Get Price

History of metals timeline text version there are currently 86 known metals but before the 19th century only 24 had been discovered and, of these 24 metals, 12 were discovered in the 18th century.The metals of antiquity, were the metals upon which civilisation was based.1 gold ca 6000bc - stone age man learned to fashion gold into.

Copyright © 2020 Henan Mining Machinery All rights reserved.Sitemap