a67 4 1000 60000 a67.dat 16 2/uV 12 0 -22 26545 0 AECG1 a67.dat 16 2/uV 12 0 14 -25100 0 AECG2 a67.dat 16 2/uV 12 0 -78 19946 0 AECG3 a67.dat 16 2/uV 12 0 -103 18246 0 AECG4