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: comprising a fluid together with substances in solid or gaseous states, whether due to deliberate addition or a change of state caused by a change in conditions; Name: multi-phase