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: norm describing the material. The material number is taken from this norm. Type and number of the norm with issue year and issue month must be given; Name: Reference norm material of the pump head