A.加速坡、平臺、溜放坡 B.溜放坡、壓鉤坡、平臺 C.加速坡、壓鉤坡、中間坡 D.加速坡、中間坡、道岔區(qū)坡
A.20m B.30m C.40m D.50m
A.1m~5m B.7.5m~10m C.10m~15m D.15m~20m