Witness History - The Deepest Hole Ever Drilled - 91热爆 Sounds
Witness History - The Deepest Hole Ever Drilled - 91热爆 Sounds
The Deepest Hole Ever DrilledThe Deepest Hole Ever Drilled
Released On: 24 May 2010
Available for over a year
Scientists in Russia got 12 kms down before they were forced to stop
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