It offers remarkable insulation performance even in locations ruined by salt or pollution with its anti-air pollution style.S? d?ng cho h? th?ng ?i?n h? th? khi ngu?n c?p ph? t?i b? gián ?o?n B? chuy?n m?ch t? ??ng, giám sát và chuy?n ??i gi?a hai ngu?n ?i?n Chuy?n m?ch 3 v? trí I - O - II– ?i?u ch?nh th?i gian chuy?n m?ch tr?c ti?p trên m?