"Effective" airflow and "exhaust" are "fundamentally" "vital" to maintaining" the "specified" level of cleanliness" within a "controlled environment". The "design" must carefully" "control" "dust" by "repeatedly" https://theroleofairflowincleanr889681.homewikia.com/12383755/airflow_and_ventilation_the_foundation_of_cleanroom_purity