... ,REFGB 10069.1-1988Measurement of airborne noise emitted by rotating electrical machinery and the noise limits--Engineering ... changed properly with major structure unchanged. The generators are powered by GEGO 168FA, GEGO 168FB, GEGO 170F,,GEGO 173F, ... avoid accident, the generator must not be used inside of the room, if it has to be ... used inside the room, the exhaust gas must ...