... long life time 2)ISO9001 certificate 3)steady quality 4-72 type centrifugal blower Shandong Rotech is one leader centrifugal ... kinds of engineering blowers ,industrial blowers, air conditioning fan and special blower motors.Our main products:(1)Y4 ... Y9-19 boiler centrifugal blower.(2)4-79centrifugal blower, 4-2X79centrifugal blower, 4-72centrifugal blower, 4-70centrifugal blower,(3)W4-68 high ...