"Adequate" airflow and ventilation" are absolutely" "essential" to "preserving" the "required" level of cleanliness" within a cleanroom". The "design" must "meticulously" "control" "contaminants" by "repeatedly" https://airflowandventilationinc377824.sasugawiki.com/7974013/airflow_and_ventilation_the_foundation_of_cleanroom_purity