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portal crane |
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portal crane [′pȯrd·əl ′krān]
(mechanical engineering) A jib crane carried on a four-legged portal built to run on rails. gantry crane A revolving crane, positioned atop a movable pedestal that travels along tracks; can reach a more extensive area of a construction site than a stationary crane of similar size. 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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