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单词 underhand stoping
释义 underhand stoping
[`ǝn·dǝr´hand `stōp·iŋ]
MINING ENGINEERING
Mining downward or from upper to lower level; the stope may start below the floor of a level and be extended by successive horizontal slices, either worked sequentially or simultaneously in a series of steps; the stope may be left as an open stope or supported by stulls or pillars.
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