Filter/dilution tunnel. A smoke sample is drawn by way of a tube wherever it can be diluted with air, the ensuing smoke/air combination is then pulled by way of a filter and weighed. This is the internationally regarded means of measuring smoke from combustion.[66] Narrowed blood vessels within the https://chinesebrandingagency03580.laowaiblog.com/33157698/not-known-factual-statements-about-smoke