So hydraulicpress driven by pump-accumulator can boost pressure more quickly than driven directly by pump, but the work is equal when the two types of presses make work pieces deformed.
因此，它比泵直接传动的压机升压快，但是在使工件产生变形时作的功都是相等的。
2
Accumulator is used in hydraulicpress driven by pump-accumulator. The high pressure pump with small flow can put working liquid into the accumulator in the intermittent working time of press.