Description: difference between the instant value of pressure and the static pressure; Name: pressure of sound
Description: measured dfifference between instantaneous pressure and static pressure; Name: sound pressure
Description: norm/stipulation describing the explosion protection. The explosion protection type, the device category, the temperature class as well as the device / explosion group are taken from this norm. The type and number of the norm/stipulation with issue year and issue month must be given; Name: Reference norm of the explosion protection