Description: identification of the type of ignition protection to be used or the hazardous environment of a device, based on a standard; Name: Explosion protection label
Description: marking on a device according to a directive or standard that indicates the type of protection implemented or the hazardous environment in which it may operate; Name: explosion protection marking
Description: variable quantity, which is not influenced by the control but is introduced into the control system from outside with the aim of making the final controlled variable follow it in a given relationship; Name: command variable