答案:B
A. (A)20
B. (B)40
C. (C)60
A. (A)步进电动机驱动器保险烧断
B. (B)测速发电机传动皮带松驰
C. (C)主控器5.6号触头接触不良
A. A.开放状态
B. B.关闭状态
C. C.无显示状态
A. (A)500
B. (B)600
C. (C)800
A. (A)50kPa
B. (B)60kPa
C. (C)70kPa