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pillar-and-stall system |
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pillar-and-stall system [′pil·ər ən ′stȯl ‚sis·təm] (mining engineering) A system of working coal and other minerals where the first stage of excavation is accomplished with the roof sustained by coal or ore. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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