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multiple-entry system
释义
multiple-entry system
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.
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更新时间:2026/10/15 14:51:03