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9 हंगाम
77 भाग
Extreme Engineering - Season 2 Episode 9
In northern Minnesota, the operators of the world's largest open-pit iron mine commission the construction of a $10 million custom-built super-shovel in the hopes of making excavation more efficient.
- वर्ष: 2011
- देश: United States of America
- शैली: Documentary
- स्टुडिओ: Discovery
- कीवर्ड: engineering
- संचालक:
- कास्ट: