World Mining: Mining: Mponeng - World deepest ( 4,1 km ) mine Mp...

World Mining: Mining: Mponeng - World deepest ( 4,1 km ) mine Mp...: Mining: Mponeng - World deepest ( 4,1 km ) mine Mponeng Go... : World deepest 4,1 km below surface mine Mponeng Gold Mine, South Africa M...

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