Description: Language-independent identification of a class that is unique within a classification system; Name: class code
Description: language-independent, unambiguous code of a class within a class system; Name: code of class
Description: the pressure whose value is equal to the algebraic difference between the absolute pressure and the atmospheric pressure. To this end, the overpressure for a pressure room can, for example, be negative with underpressure or under vacuum; Name: Max. overpressure of the shaft seal