"Proper" airflow and "aeration" are "completely" "essential" to "preserving" the desired" level of "sterility" within a "sterile area". The "design" must carefully" "regulate" particles" by constantly" "exchanging" the https://unidirectional-airflow-c143807.tnpwiki.com/436679/airflow_and_ventilation_the_foundation_of_cleanroom_purity