... low temperature thermomechanical treatment 低温形变热处理 low vein 薄矿脉 low velocity explosive 低速炸药 ...
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极薄矿脉赋存条件复杂。
其研究结果对缓倾斜极薄矿脉的开采具有重要意义。
The research is of great reference significance to the mining of the gently inclined and thin ore vein.
葡萄牙帕纳什·凯拉黑钨矿为微倾斜极薄矿脉,开采难度大。
Portugal Panasqueira wolframite deposit consists of very thin, gently dipping veins which are very hard to mine efficiently.
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