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: measure of the increase in the pumped liquid water on a pipe connected vertically to the pump when the flow rate is zero. related to the operation of the pump at 1,450 rpm with maximum impeller size; Name: pump shut-off head for maximum impeller diameter at 1450/min