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holing |
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holing [′hōl·iŋ]
(mining engineering) The working of a lower part of a bed of coal to bring down the upper mass. The final act of connecting two workings underground. The meeting of two mine roadways driven to intersect. Also known as thirling. holing The punching of holes in slates before fixing on a roof. 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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