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primary drilling |
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primary drilling [′prī‚mer·ē ′dril·iŋ] (engineering) The process of drilling holes in a solid rock ledge in preparation for a blast by means of which the rock is thrown down. 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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