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back draft |
Also found in: Wikipedia | 0.02 sec. |
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back draft [′bak ‚draft] (metallurgy) A reversed taper given to a casting model or pattern to prevent its withdrawal from the mold. 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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63) Whether the present state of affairs, that is, the Arab's muscular invective in the form of terrorism, is an explosive back draft of the western Orientalist perspective is a topic worthy of a separate inquiry. Holes are often elliptical with back draft to prevent sprue hangup. But in sand casting, they can also add strength, and are essential when a pattern contains back draft or projections which cannot be molded. |
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