English to Chinese Medical Medical (general)

"Containment primary engineering control (C-PEC): A ventilated device designed and operated to minimize worker and environmental exposures to HDs by controlling emissions of airborne contaminants through the following：

The full or partial enclosure of a potential contaminant source
The use of airflow capture velocities to trap and remove airborne contaminants near their point of generation
The use of air pressure relationships that define the direction of airflow into the cabinet
The use of HEPA filtration on all potentially contaminated exhaust streams"