确保伺服控制单元处于打开位置。
A Make sure that the service control unit is in the open position.
B Make sure that the servo control unit is in the right position.
C Make sure that the servo control unit is in the open position.
A Make sure that the service control unit is in the open position.
B Make sure that the servo control unit is in the right position.
C Make sure that the servo control unit is in the open position.