题目内容
The relief valve is normally open and the pressure reducing valve is normally closed. ( )
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The selection of hydraulic oil mainly considers its viscosity. ( )
Sequence valve is a flow control valve ( )
Without considering leakage, the flow calculated according to the geometric dimensions of the hydraulic pump is called the theoretical flow ( )
The essence of the self-priming ability of the hydraulic pump is due to the partial vacuum formed in the oil suction cavity of the pump, and the oil in the oil tank flows into the oil chamber under the action of atmospheric pressure ( )
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