... after long time operation Wet pad and ventilation fan system is the best cooling system widely used in many places like, big ... hall, supermaket, chemical plants, big factory workshops etc. ventilating fan series ... style9FJ-900B1000*1000*4000.55 shutter, frame, wind set, fan blade are galvanized9FJ-1000B1100*1100*4000.759FJ-1250B1385*1385*4001 ...