1.single phase,low noise,light weight so can move easily. 2.with the good capability,the novel pattern 3.explosive-proof fan. explosive proof fan Main material: made of dia-cast aluminum alloy,fan body and cover:galvanized steel,handle: die-cast plastics,cable length:3m motor: aluminum alloy,with America,Japan,Europe,Taiwan styles' plug for choosing. Application: The explosive-proof ventilator ...