A HEPA filter is a type of particle filter. Every air purifier has a particle filter, but not all are considered “true HEPA” filters. The specifications are determined by the US Department of Energy and require a minimum efficiency of 99.97 percent when filtering airborne particles of 0.3 microns. HEPA filters can remove dust, pollen, mold and bacteria.
Медведев выступил за ускорение законодательного регулирования опасных заболеваний мигрантов20:52
，更多细节参见搜狗输入法
C10) STATE=C110; ast_C9; continue;;
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