Descriptors | Aerosols, Sprayer nozzles, Stop valves, Air cleaning equipment, Photomultipliers, Air filters, Emission spectrophotometry, Sodium chloride, Humidity control, Calibration, Test equipment, Spectrophotometry, Testing conditions, Sodium, Filters, Performance testing, Flame photometry, Maintenance, Circuits, Membrane filters, Dimensions, Permeability measurement |