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: The norm in fixed relation to the feature being described. This defines the parameters that influence the contents of the correlated feature. Type and number of the norm with issue year and issue month must be given, e.g. DIN ISO 4711:YYYY-MM.; Name: Reference norm of the static seal, housing