R1 7H b 0238 0 50V 25V 5.0s 口V(R1:2) TimeV L1 7H 1 2 C 1 0.0238 R 1 6 0 Time 0s 1.0s 2.0s 3.0s 4.0s 5.0s 6.0s V(R1:2) 0V 25V 50V