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Foraky boring method |
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Foraky boring method [fə′räk·ē ′bȯr·iŋ ‚meth·əd] (mining engineering) A percussive boring system; a closed-in derrick contains the crown pulley, over which a steel rope with the boring tools is passed from a drum; the drum moves the tools, which are vibrated by a walking beam. 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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