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Mineral & energy resources
Army public school
•
Há 10 anos
Topic 7-mining methods-part iii -surface mining- placer mining
Geology Department, Faculty of Science, Tanta University
•
Há 8 anos
Yukon Placer Mining Industry Overview 2010
William LeBarge
•
Há 12 anos
Alaska Gold Corp. PowerPoint Presentation
alaskametalscorp
•
Há 12 anos
Gold mining process
physics101
•
Há 12 anos
Placer gold mining in alaska
Dylan McFarlane
•
Há 8 anos