3.big air volume
1. Galvanized zinc plate frame, national level one environment friendly
galvanized zinc plate, thicker zinc coat
2.Aluminum magnesium alloy hub, light weight, high strength and good tensile
3. Stainless steel blade, bearing imported from France, Europe industry motor
4 . Belt imported from Korea, type B, thicker and durable, adjust automatically.
5. Special push-pull device,make sure the shutter open and close completely.
6. Six strict inspection process: noise inspection, vibration test, concentric
performance test, fan blade rotation test, wind capacity test and the efficiency
7. with CE, CCC, ISO certificate