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jack post |
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jack post [′jak ‚pōst]
(mining engineering) Timber used where a coal seam is separated by a rock band and one bench is loaded out before the other. jack post A post comprising two telescoping sections, so that it is adjustable in height; used to support a floor beam. 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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