单项选择题
A.a stuck solenoid valve B.a shortage of refrigerant C.too much oil in circulation D.too much superheat
In an electro-hydraulic steering system, under movement...
单项选择题In an electro-hydraulic steering system, under movement is maintained in close synchronization with the steering wheel position by means of the （）.
A.trick-wheel B.follow-up control C.six-way valve D.Rapson slide
The internal force of a material, which tends to resist...
单项选择题The internal force of a material, which tends to resist deformation when subjected to external forces, is known as （）.
A.stress B.strain C.shear strength D.ultimate tensile strength
An increase in rotor clearances in a rotary pump will （...
单项选择题An increase in rotor clearances in a rotary pump will （）.
A.increase discharge pressure B.decrease pump capacity C.decrease pump cavitation D.decrease reaction ring clearance
