Description: In solid mechanics, in the field of rotordynamics, the critical speed is the theoretical angular velocity that excites the natural frequency of a rotating object, such as a shaft, propeller, leadscrew, or gear. ; Name: crit. speed
Description: Speed of rotation at which the frequency of vibration (or its multiples) corresponds to the rotor resonant (lateral or torsional) ; Name: Critical speed
Description: For a given operating resource, the lowest temperature, below which the temperature may not ever fall, of materials or measuring substances below which the resource cannot be operated without permanent changes in its characteristics; Name: Min. work temperature