YZ-B type detection device for railway locomotive, voltage 1000V current 7A.DF8B board key switch group S450B-B/10 bit, DF8B board key switch group S451B-B/4 bit, DF8B key switch S126D, DF8B board button switch PS30/3 (I), DF8B board button switch PST9/7 (T), DF8B board button switch PS520/19 (I), DF8B board button switch LS303/3P5X2 (I), DF8B board button switch LS303/3P5X2 (I), DF8B board button switch Close (flat head blue) S403-B-B2/2, DF8B button switch (round mushroom head green) S403M-L-B2/3. TAG：