问题:对水资源的开发利用、养蓄、保护、管理的目地是什么?...
Saturday, September 10, 2022
问题:在给水配水机房中卧式泵型号表示中,SH表示()。...
Saturday, September 17, 2022
问题:有两个电阻串联工作,电阻R1阻值为10Ω;电阻R2的阻值为12Ω...
Saturday, September 17, 2022
问题:潜水排污泵中轴向力主要是由液体作用在叶轮上的()和整个转动部分的...
Saturday, September 17, 2022
问题:弹性圈柱销联轴器优点是弹性良好,能吸收一部分(),有益于制造,拆...
Saturday, September 17, 2022
Saturday, September 10, 2022
问题:有一条输水管,水流速度υ=1m/s,水温T=20℃,管径d=20...
Saturday, September 17, 2022
Saturday, September 17, 2022
Saturday, September 17, 2022
问题:矿浆电机淹的主要原因是()A、设备问题B、水没电机C、管路漏水...
Tuesday, March 12, 2024
Sunday, November 5, 2023
问题:已知一台泵的实际流量为Q=470m3/h,漏渗量为Δq=57m3/h,机械效率为0.80,水力效率为0.88,求该泵的总效率?...
Saturday, March 18, 2023
Sunday, September 11, 2022
Sunday, September 11, 2022
Saturday, September 10, 2022
Saturday, November 18, 2023
问题:有两个电阻串联工作,R1=40Ω,R2=20Ω,串联电路的总电压...
Sunday, September 11, 2022
问题:干式变压器运行时,操作人员应不间断地监视其()温度值。...
Saturday, September 17, 2022
问题:电动机在冷态下允许连续启动两次,每次间隔时间不小于()分钟。...
Saturday, September 10, 2022
Saturday, September 10, 2022