题目内容
When the pstion number of the piston pump is an odd number, its flow pulsation rate is smaller than when it is an even number ( )
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The pressure-limiting variable pump mainly depends on the change of the outlet pressure of the pump to change the flow rate of the pump ( )
Compared with gear pump, vane pump and piston pump, piston pump has the highest maximum pressure, gear pump has the lowest volumetric efficiency, and double-acting vane pump has the lowest noise ( )
If the leakage of the hydraulic cylinder is not considered, the movement speed of the hydraulic cylinder is only determined by the flow rate in ( )
The output thrust of the hydraulic cylinder is determined by the hydraulic pressure entering the hydraulic cylinder ( )
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