Kuti uone kuvuza kweHEPA Sefa, inozivikanwa kwazvo kushandisa aerosol photometer yekuyedza. ZR-6012 Aerosol Photometer yakaedzwa nemainjiniya siku nesikati. Nhasi, ichaburitswa pub...
MUFARO wakadini kuva neshamwari dzinobva kure!— Confucius