Giá tr? ti?t ki?m: T?ng h?p toàn b? chi phí ti?t ki?m ???c t? vi?c s? d?ng ?i?n m?t tr?i thay cho ?i?n l??i.Your browser isn’t supported any more. Update it to get the best YouTube practical experience and our most recent capabilities. Learn morePermit/Disable Shorter Circuit Safety (B?t/T?t Ch? ?? b?o v? ng?n m?ch): ?ây là ch? ?? cho phép