题目内容
The sequence valve can control the outlet pressure of the valve to be stable ( )
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In the double-pump oil supply circuit, when no load, the system is only supplied by a small pump alone ( )
The ideal liquid is an imaginary liquid that is neither viscous nor compressible. ( )
The relief valve is normally open and the pressure reducing valve is normally closed. ( )
The selection of hydraulic oil mainly considers its viscosity. ( )
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