The paper provided an economic and practical self-rescuer relay emergency refuge method. The personnel into the mine shall wear the compressedoxygen self-rescuer.
提出了经济实用的自救器接力紧急避险方法：入井人员佩戴压缩氧自救器；
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Conclusions oxygen nebulization inhalation is better than compressed air nebulization inhalation and low flow oxygen nebulization inhalation is a safety method in treating the patients with COPD.
Aluminium plastic compound pipe may be used for transportation of cold and hot water, liquid acid, alkali and salt, and various gases as fuel gas, oxygen, compressed air, etc.