English to Italian Tech/Engineering Construction / Civil Engineering prove al fuoco

the distance between the nozzle tip (punta dell'ugello) and the center of the exposed area shall be determined by the deviation from normal between the center of the nozzle axis and the center of the exposed area of the specimen. The distance shall be 3 m when the axis through the center of the nozzle *is normal to* the center of the exposed area.

sempre l'attrezzatura per la prova del getto della manichetta antincendio su pareti