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单词
block caving
释义
block caving
block caving
[
′bläk ‚kāv·iŋ
]
(mining engineering)
A method of caving where a block, 150-250 feet (46-77 meters) on a side and several hundred feet high, is induced to cave in after it is undercut; the broken ore is drawn off at a bell-shaped draw point.
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更新时间:2025/6/26 10:12:52