“nonselective mining”的概念、定义、翻译、参考文献-科学参考

单词	nonselective mining
释义	nonselective mining [¦nän·si`lek·tiv `mīn·iŋ] ^{MINING ENGINEERING} Mining methods permitting low cost, generally by using a cheap stoping method combined with large-scale operations; can be used in deposits where the individual stringers, bands, or lenses of high- grade ore are numerous and so irregular in occurrence and separated by such thin lenses of waste that a selective method cannot be employed.
随便看	overgrinding overgrowth overhand cut and fill overhand stope overhand stoping overhang overhaul overhauling Overhauser effect overhead overhead cableway overhead camshaft overhead compass overhead cost overhead fire overhead position overhead shovel overhead traveling crane overhead-valve engine overheat overheating effect overhit overite overland flow overlap

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