题目内容
When the differential connection of the hydraulic cylinder is working, the cylinder's ().
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When the effective area of the piston of the hydraulic cylinder is fixed, the movement speed of the piston depends on ().
Which cylinder should be chose to achieve differential connection? ()
The type of hydraulic cylinder often used for long cylinder is ().
Cylinder has a bore area of 300 cm2 and velocity of 180 cm/min. Calculate the flow rate of a pump
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