Warm tips: electromagnetic radiation is divided into two levels, μT andμW/ ㎝ 2. It will has a certain harm to human body if the radiation is above 0.4 μT, long-term exposure is prone to leukemia. . If radiation below 0.4 μT, the radiation is relatively safe. If severe radiation is above 10 μW/ ㎝ 2 ,
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