• 2021-04-14
    图示二级调压回路,溢流阀1的调定压力为7MPa,溢流阀2的调定压力为5MPa,溢流阀3的调定压力为3MPa,系统负载无穷大,当1YA通电时,系统的压力为:http://image.zhihuishu.com/zhs/onlineexam/ueditor/201803/2892623a3b4c45889933251bd7c89bad.png