Description: the attribution of numbers and letters to a device that allows tracing the date, time and circumstances of fabrication; Name: number of production
Description: alphanumeric character sequence assigned to a fabricated product, which allows the date, time and circumstances of fabrication to be traced; Name: fabrication number
Description: relationship between the total head of the pump and the rate of flow at given operating conditions /rated conditions of speed and liquid; Name: Pump efficiency curve