• 2021-04-14
    【填空题】两敞口容器间用离心泵输水,已知转速为n1时,泵流量【图片】1=100l/s, 扬程He1=16 m; 转速为n2时,【图片】2 =120 l/s, 扬程He2=20m, 则两容器的垂直距离=_____ m