单项选择题
A.The six-way valve opens
B.The steering service pump motor is stopped
C.The follow-up gear takes the pump off stroke
D.The cylinder relief valves bypass oil to the suction side the pump
单项选择题 In an electro-hydraulic steering gear, any change in relative position between the synchronous receiver and the follow-up gear will result in（）
单项选择题 As the designated rudder angle is being achieved, as a result of the original command input, the steering gear follow-up mechanism is（）
单项选择题 In a fixed displacement axial piston hydraulic motor, the speed is varied by（）