... ,anti-swing safety CWZ Series Maritime fanner---Smaller type fan 1.GeneralCWZ series marine or navy small ... made into two structure types, type I (tube type), type II (porthole type): I tube type for ventilation of short tubes or ... fixed on the bulkhead. II type fixed on porthole. It can be fixed on ... the inlet is opening,4.5 After the fans wiring, the terminal box should be sealed, avoid ...