Description: for a proportional element, the quotient of the change in the output variable and the associated input variable; Name: proportional coefficient
Description: proportional element, the quotient of the variation of the output variable to the corresponding variation of the input variable; Name: proportional action coefficient
Description: difference between the total energy height on the outlet side of the pump aggregate and the total energy height of the intake side of the pump aggregate ruling at operating point; Name: nominal feed height