short-hole shrinkage method
short-hole shrinkage method
短孔收缩法
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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Short-hole shrinkage method without sill pillar occupies 60%.
无底柱浅孔留矿采矿法60%。
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Short-hole shrinkage mining is an effective method for mining steep-thin veins, and it has advantages of high-efficiency and low-waste and simple technology.
浅孔留矿法对急倾斜薄矿脉的矿体开采是一种有效的采矿方法，具有高效低耗与工艺简单等优点。
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