water protecting pillar 防水矿柱
protecting pillar thickness 防水煤柱厚度
Extraction of protecting pillar 保安矿柱开采
protecting pillar in pit shaft 井筒保护煤柱
design the water protecting pillar 防水煤岩柱留设
protecting g pillar 保安矿柱
protecting pillar
保护柱
以上为机器翻译结果,长、整句建议使用 人工翻译 。
Applying small pillar to protecting roadway is a wide used layout in mining roadway.
小煤柱护巷是工作面上风巷普遍采用的一种布置方式。
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It is the most common way to remain coal safety pillar for protecting surface buildings from mining damage.
留设保护煤柱是防止建筑物受采动损坏的最常用方法。
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