题目内容

The ideal liquid is an imaginary liquid that is neither viscous nor compressible. ( )

A. 对
B. 错

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The relief valve is normally open and the pressure reducing valve is normally closed. ( )

A. 对
B. 错

The selection of hydraulic oil mainly considers its viscosity. ( )

A. 对
B. 错

Sequence valve is a flow control valve ( )

A. 对
B. 错

Without considering leakage, the flow calculated according to the geometric dimensions of the hydraulic pump is called the theoretical flow ( )

A. 对
B. 错

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