题目内容
The maximum vacuum degree will not exceed one atmosphere pressure ( )
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The flow rate through thin-wall orifice is related to the density and viscosity of the liquid ()
The differential connection of the hydraulic cylinder can increase the movement speed of the piston and obtain a large output thrust ()
The theoretical flow rate of a hydraulic pump is related to its structural size and rotational speed, and has nothing to do with working pressure ()
Check valve, relief valve, throttle valve can all be used as back pressure valve ()
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