A、(1) only
B、(2) only
C、(1) and (2)
D、(1),(2)and(3)
更多“ As for a hydraulic vane pump, which of the following is in contact with the vanes during working: （）<br /> (1)the rotor<br /> (2)the pump shaft<br /> (3)the external surface of the housing”相关的问题
A、act as a shock absorber B、maintain the stored oil under pressure C、act as a base or foundation for the power unit D、eliminate pressure surges in the system
A、add fluid that is the same color as the fluid in the reservoir B、add turbine oil because it is always a good substitute C、add any oil that has the same viscosity as the hydraulic fluid D、check the winch manufacturers instruction book
A、molecular fluid vibration B、energy losses C、wide pressure variations D、mechanical damage to control valves
A、control the back pressure of return oil B、lock the oil lines under some conditions C、change the direction of oil flow D、act as relief valve
A、A.molecular fluid vibration B、B.energy losses C、C.wide pressure variations D、D.mechanical damage to control valves
A、open ”text.dat” For write As # 1 B、open ”text.dat” For Binary As # 1 C、open ”text.dat” For Input As # 1 D、open ”text.dat” For Random As # 1
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