Description: Period of time during which maintenance actions are performed on an item either manually or automatically, including the time due to delays inherent in the maintenance action.; Name: mt
Description: Time interval when maintenance is carried out on an item including technical, logistic and internal administrative delays; Name: Maintenance time
Description: determined through a surface, product of the sound pressure, p, and the component of the particle velocity, un, at a point on the surface in the direction normal to the surface, integrated over that surface; Name: sound power