Description: Period of time in which an object is in external disturbance; Name: external disruption time
Description: time interval throughout which an item is in an external disabled state; Name: external disabled time
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 material, pumping medium