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Mining ppt 2014

Mar 29, 2014· Mining ppt 2014 1 Presented by : Ajoy Saikia Department of Earth & Environmental Science KSKV KACHCHH UNIVERSITY2014 2 Mining is the process of extracting minerals like gold, silver, copper, nickel and uranium (metallic) and salt, potash, coal and oil (nonmetallic) formations that concentrate naturally in the earth 3...

C'est pas sorcier

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Safety Training PowerPoint Presentations

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Introduction

L´ensemble des mines de charbon fut alors nationalisé L´État devient le seul patron, à même de décider des objectifs et de l´organisation de la production du charbon, énergie cruciale dans le contexte de reconstruction du pays aprés la Seconde Guerre mondiale...