A.换速 B.平层 C.加油 D.检修
A.600,600,500 B.600,500,600 C.800,600,500 D.800,600,600
A.10 B.11 C.13 D.14
A.0.3+0.035v2 B.0.1+0.035v2 C.1.0+0.035v2 D.0.5