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Redpath Mongolia LLC - Impressive shaft sinking work continues in Mongolia at Oyu Tolgoi 2 Shaft, at 10m in diameter; drilled with an 8 boom Jumbo drill and mucked with a 14 ton excavator! | Facebook
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Shaft Drilling Jumbo (SDJ) - Herrenknecht AG
Shaft Drilling Jumbo (SDJ) - Herrenknecht AG
Shaft Sinking
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Shaft sinking from 1970 to 2007: Mechanical excavation
