... and high pressure while the pump operation, obtaining a large output flow, the return oil will flow back ... .5,3.5/4,6,10802.5、3.52.54、6、10440609DSD2.5,3.5/1620,25, ... 、25、327.58012011DSD5.5/40,50,63635.52.540、50、637.512020012DSD9/40,50,634092.540、50、637.512020013DSD9/80,100,1254091 ... .580、1007.530014DSD13/40,50,633213240、50、 ...