... OEM,competitive price 4.high volume 5.high efficiency Backward Curved Air Blower Fan Made In Chinaxinxiang city ventilator general factory CO., LTD ... 1919~9149pa 5)rotated speed:2900rpm Y9-11 HIGH PRESSURE CENTRIFUGAL FAN This series are used for coercive ventilation in industrial ... system base, main shaft, driving system (bearing house, bearing), coupling Backward Curved Air Blower fan made in china