1. 露天开采的;露天矿：open-wharf mooring island 系泊岛式码头 | opencast 露天开采的;露天矿 | opened oil and gas gathering process 开式油气收集工艺
2. 露天挖掘的：openable 能开的 | opencast 露天挖掘的 | opencircuitbrokencircuit 断路
3. 露天矿,露天开采：open table 大台面:指圆形明亮琢型钻石的台面大于65% | opencast 露天矿,露天开采 | opening up the stone 打开原石
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1. （矿井）露天（开采）的
At an opencast mine, the coal, metal, or minerals are near the surface and underground passages are not needed.
1. Iron mining in Belinga will be " the greatest opencast work of the century " in Gabon, the report cited the Gabonese president as saying.
adj
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1. (of mines and mining) worked from the exposed surface
e.g. opencast mining
an opencut iron mine
Synonym: opencut