"Effective" airflow and ventilation" are "fundamentally" "essential" to "preserving" the "required" level of "purity" within a "sterile area". The system" must carefully" "control" "dust" by "repeatedly" "filtering" https://whycleanroomventilationm101223.blog2freedom.com/41963328/airflow-and-ventilation-the-foundation-of-cleanroom-purity