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multiple-entry system |
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multiple-entry system [′məl·tə·pəl ′en·trē ‚sis·təm]
(mining engineering) A system of access or development openings generally in bituminous coal mines involving more than one pair of parallel entries, one for haulage and fresh-air intake and the other for return air. 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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