Description: Classification of the devices according to the level of safety; Name: Explosion protection category for devices (electric motor)
Description: Allocation of the devices in accordance with the safety measure; Name: Explosion protection category for devices , electric motor
Description: 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