“shortwall”的概念、定义、翻译、参考文献-科学参考

单词	shortwall
释义	shortwall [`shȯrt´wȯl] ^{MINING ENGINEERING} 1. A method of mining in which comparatively small areas are worked separately. 2. A length of coal face between about 5 and 30 yards (4.6 and 27 meters), generally employed in pillar methods of working.
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