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: minimum boundary value of the temperature range, in which an operating unit can be used, without serious changes of assigned features, depending on the exposure time. Temporal restrictions like short-time or durability have to be stated; Name: min. temperature range