miscella concentr 混合油浓度
You may find that you can't concentr on the mrial for more than an hour (or a half hour).
可能你会发现自己无法专心阅读超过一小时（甚至半小时），这时你就需要一个计划。
This product enjoys the characteristics of low power dissipation, low cost. Meanwhile, it has the function of digital display of temperature, humidity and oxygen concentr…
该产品性能稳定、功耗低，价格低廉，具有精确数字显示温度、湿度、氧气浓度等功能。
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