Hydraulically, servo-operated, automatic, change over valves, utilized in a two ram hydraulic steering gear, serve to .

题目介绍: Hydraulicallyservo-operatedautomaticchangeovervalvesutilizedinatworam hydraulicsteeringgearserveto., allow an alternate main pump to start in the fully loaded condition thus developingimmediate full torque?prevent either main pump from being hydraulically motored when idle by cross pressureflow?prevent both units from operating simultaneously which could result in doubling theflow of oil and pressure leading to over pressurization of the system?all of the above? 本题为最佳选择题收录于二管轮题库中。