the place where corresponding surfaces of the different parts of a flameproof enclosure come together and prevent the transmission of an internal explosion to the explosive gas atmosphere surrounding the enclosure Found on http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=426-06-02
the place where corresponding surfaces of the different parts of a flameproof enclosure come together and prevent the transmission of an internal explosion to the explosive gas atmosphere surrounding the enclosure