... overall stripping ratio 平均剥采比 pit-limit stripping ratio 境界剥采比 economic stripping ratio 经济剥采比 ...
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There are many complications that influent open-pit limit and the economic stripping ratio is the most important one.
影响露天矿开采境界的因素很多，其中一个最重要的因素就是经济合理剥采比。
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