In Canada, almost two miles underground in the world's deepest copper and zinc mine, a mighty drill chews through rock, digging deep holes which are then filled with explosives and detonated, leaving behind debris packed with valuable minerals. Meanwhile in Helsinki, Finland, cameras follow a mission to excavate a new metro tunnel to improve commuter services - but working seven metres beneath the bustling city calls for precision engineering and one false move could lead to disaster. Plus, a mining machine works continuously underneath the Cheshire countryside to keep Britain's transport network moving. Last in the series.
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Dirty Great Machines - 1x04 Hard Rock Heroes
- Poor
- Nothing special
- Worth watching
- Pretty cool
- Awesome
- Aired May 18, 2012
- Episode 1x04
- Show special No
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- Dukz is following Dirty Great Machines. Aug 28, 2012
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