Abin farin ciki ne a sami abokai suna zuwa daga nesa! -- Confucius
Don gano zub da jini don Filter HEPA, sananne ne don amfani da photometer aerosol don gwaji. A yau, za mu ɗauki ZR-6012 Aerosol Photometer a matsayin misali don gabatar da ka'idar ganowa don ...