b47 4 1000 60000 b47.dat 16 2/uV 12 0 -24 30169 0 AECG1 b47.dat 16 2/uV 12 0 -1260 -687 0 AECG2 b47.dat 16 2/uV 12 0 -868 27236 0 AECG3 b47.dat 16 2/uV 12 0 -308 25891 0 AECG4