“multiple-entry system”的概念、定义、翻译、参考文献-科学参考

单词	multiple-entry system
释义	multiple-entry system [`mǝl·tǝ·pǝl `en·trē ´sis·tǝm] ^{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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