Ph?n l?n m?c tiêu chung c?a ng??i ch?i cá c??c t?i 123B là h??ng t?i s? chi?n th?ng. M?c dù có t? l? c??c cao h?n nh?ng n?i khác nh?ng không ph?i ng??i ch?i nào c?ng may m?n dành th?ng cu?c.The hardest faults to seek out are those that occur only Occasionally-intermittent function. They may be caused by undesirable connections, dust, dirt,