mining limit line 采掘范围线
upper mining limit 回采上限
stepwise mining limit 分期开采境界
improving mining limit 提高开采上限
mining limit optimization 开采境界优化
mining upper limit 开采上限
lifting upper limit of mining 提高开采上限
mining g limit 采区边界
limit of seam mining 煤层综放开采上限
Based on the "surface mine long term planing model" the stepwise mining limit optimization model has been set up for inclined ore bed.
在倾斜矿床露天矿长远规划模型的基础上，建立了分期开采境界优化模型。
Dave Noonan, the national secretary of the Construction, Forestry, Mining and Energy Union, says Australia must limit the influx of foreign workers.
建筑、林业、矿产和能源联合会全国事务长戴夫·努南说，澳大利亚必须限制外国工人涌入。
As natural sandstone resources shortage, countries gradually has formulated a series of policies and regulations to limit natural sand mining.
随着天然砂石资源的逐渐短缺，国家制定了一系列政策法规来限制天然砂石的开采。
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