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单词 block-caving
释义 block-caving
\ˈ ̷ ̷ˌ ̷ ̷ ̷ ̷\ noun
(-s)
: a mining in which sections of a large ore body are undercut by working places and then permitted to cave in, the ore so crushed being recovered through drifts
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更新时间:2024/12/24 3:23:32