"Proper" airflow and "aeration" are "completely" "essential" to "ensuring" the "required" level of cleanliness" within a "controlled environment". The "design" must carefully" "regulate" "dust" by "repeatedly" https://theroleofairflowincleanr467237.isblog.net/airflow-and-ventilation-the-foundation-of-cleanroom-purity-59230975