Description: Time period, starting from the first use and ending with the time when the limit state is reached.; Name: Service life
Description: Time interval from first use until the instant when a limiting state is reached ; Name: useful life
Description: maximum value of ratio between the applied shear stress and rate of shear of a liquid at design temperature it is sometimes referred to as the coefficient of dynamic viscosity, or simply viscosity, thus dynamic viscosity is a measure of the resistance to flow or deformation of a liquid; Name: maximum dynamic viscosity at design temperature