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bell hole |
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bell hole [′bel ‚hōl]
(mining engineering) One of the holes or excavations made at the section joints of a pipeline for the purpose of repairs. A conical cavity in a coal mine roof caused by the falling of a large concretion. 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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