Description: alphanumeric character sequence assigned to a fabricated product, which allows the date, time and circumstances of fabrication to be traced; Name: Number of fabrication
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: Speed of rotation at which the frequency of vibration (or its multiples) corresponds to the rotor resonant (lateral or torsional) ; Name: Critical speed