题目内容
Sequence valve is a flow control valve ( )
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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 ( )
In order to improve the self-priming ability of the pump, the vacuum of the suction port of the pump should be as large as possible ( )
The double-acting vane pump can be made into a variable pump ( )
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