"Effective" airflow and "exhaust" are absolutely" "vital" to "preserving" the "specified" level of "sterility" within a cleanroom". The "configuration" must carefully" "control" particles" by "repeatedly" "exchanging" https://unidirectional-airflow-c778269.bmswiki.com/6185828/airflow_and_ventilation_the_foundation_of_cleanroom_purity