The prototype has a countdown, and power failure alarm function. It produces oxygen stable with low noise, consistents with relevant national product standards.
该样机具有倒计时，断电报警等人性化功能，产氧稳定，噪音低，符合国家相关产品标准。
The prototype has a countdown, and power failure alarm function. It produces oxygen stable with low noise, consistents with relevant national product standards.
该样机具有倒计时，断电报警等人性化功能，产氧稳定，噪音低，符合国家相关产品标准。
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