Description: Percentage probability of error-free operation over the period of time specified under the reliability period under specified environmental conditions; Name: reliability according to standards
Description: Percent probability of a fault-free operation over the period of time specified under the reliability period under specified environmental conditions; Name: Reliability according to norm
Description: Speed of rotation at which the frequency of vibration (or its multiples) corresponds to the rotor resonant (lateral or torsional) ; Name: Critical speed