如图所示系统中溢流阀的调整压力分别为<img src="https://nimg.ppkao.com/2019-04/wuacheng/2019042216063084582.jpg?sign=a33fc9b61f8524859d10f9d94ac86608&t=62d588bf" />试求当系统外负载为无穷大时，泵的出口压力为多少？如将溢流阀B的遥控口堵住，泵的出口压力为多少？<br /> <img src="https://nimg.ppkao.com/2019-04/wuacheng/2019042216064286847.jpg?sign=6b3d3ab9e0a5617f88fd686e3dce4db2&t=62d588bf" />