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: The largest radial measurement for a round object, measured as a distance through the centre line between two points in the outer circumference; Name: External diameter of the travel wheel