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mining and metallurgy in medieval europenbsp018332during the middle ages from the 5th century ad to the 16th century western europe saw a blooming period for the mining industry the first important mines here were those at goslar in the harz mountains taken into commission in the tenth century another famous mining town is falun in sweden where copper has been mined since the thirteenth...know more

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4130 chromiumnbsp018332this industrial directory contains a broad range of plates 4130 chromium molybdenum alloy companies serving all industries this premier and trusted vertical directory contains manufacturers distributors and service companies giving access to all their information...know more

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coal preparation plantnbsp018332a coal preparation plant cpp also known as a coal handling and preparation plant chpp coal handling plant prep plant tipple or wash plant is a facility that washes coal of soil and rock crushes it into graded sized chunks sorting stockpiles grades preparing it for transport to market and more often than not also loads coal into rail cars barges or ships...know more

underground mining hard rocknbsp018332underground hard rock mining refers to various underground mining techniques used to excavate hard minerals usually those containing metals 1 such as ore containing gold silver iron copper zinc nickel tin and lead but also involves using the same techniques for excavating ores of gems such as diamonds or rubies...know more