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only an indicator of fresh air quality

The State Forestry Administration Forest Products Testing Center (Changchun) Director Wang Jun and related industry experts conducted a detailed explanation. According to the Chinese Academy of Sciences Institute of Physical and Chemical Technology, deputy director of antibacterial materials testing center,
technical director Zheng Sujiang introduction, anion is only an indicator of fresh air quality, but not the higher the content the more comfortable, is still in the research stage. According to him, there are two main ways to produce negative ions, one is to simulate lightning,
by electric excitation to the water in the water ionization, resulting in negative ions; there is a negative ion powder or tourmaline powder generated negative ions, but its Itself has a certain component of the radioactive, which will have an impact on health has not yet proven.
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