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  • 25-10-2017
  • Business
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What happens to coal miners when they are working in the mines?

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Аноним Аноним
  • 25-10-2017
Coal Miners Struggle to Survive in an Industry Battered by Layoffs and Bankruptcy.  they can have a hard time breathing because of so little air that gets into the mines and many die from suffocation 
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