Description: free cross-section of the inlet opening in the inlet nozzle of the pump; Name: Inlet cross section of the pump
Description: free cross-sectional area of the entry opening in the inlet connection of the pump; Name: inlet area of the pump
Description: ten times the logarithm to the base 10 of the ratio of the sound power of a source, p, to a reference value, p0, expressed in decibels; Name: sound output level