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mining retreating
释义
mining retreating
mining retreating
[
′mīn·iŋ rē′trēd·iŋ
]
(mining engineering)
A process of mining by which the ore or coal is untouched until after all the gangways and such are driven, at which time the work of extraction begins at the boundary and progresses toward the shaft.
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savanna climate
savanna elephant vocalization project
savanna flower
savannah
savannah, americus and montgomery railroad company
英语词典包含2567994条英英释义在线翻译词条,基本涵盖了全部常用单词的英英翻译及用法,是英语学习的有利工具。
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更新时间:2026/7/15 9:04:57