23/06/2009

Transcript -- Open cast mines

Earth's physical resources: extracting coal and oil - for iPad/Mac/PC

Podcast de Earth's physical resources: extracting coal and oil - for iPad/Mac/PC

Transcript -- A fault is an underground hazard. By drilling a series boreholes, miners start the safe development of an open cast mine.

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Earth's physical resources: extracting coal and oil - for iPad/Mac/PC
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23 de junio de 2009, 02:09 UTC
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