A.0.55~0.65m/s B.0.35~0.45m/s C.0.25~0.35m/s D.0.45~0.55m/s
A.8.5~9.5 B.7~8 C.7.5~8.5 D.9~10
A. L值 B.a值 C.s值 D.b 值