对于立井提升作业的矿山，防坠罐笼是联系平地和井下的纽带。

For the mine of shaft hoisting operations, anti-dropping cage is the link of contacting the ground and underground.

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医用输氧器是小型的供氧装置，主要用于个人保健、医院、高原补氧和井下供氧等。

Medical oxygen respirator is small instrument for oxygen supply and mainly used for personal health care, hospital, plateau oxygen supplement and undermine oxygen supply, etc.

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本文以陕西韩城矿区北区钻孔和井下大量的实际观测资料为依据，提出了破坏煤分类的方案。

According to the number of practical data coming from drills and mines, the author puts forward classification of broken coal.

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