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mat packs |
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mat packs [′mat ‚paks]
(mining engineering) Timbers laid side by side into a solid mass 2 by 2½ feet (61 by 76 centimeters) square and 4-6 inches (10-15 centimeters) thick, kept together by wires through holes drilled through the edges of the mass, carried into a mine and built up to make effective roof supports. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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