问题:为市政公司埋设地下管道,泵站进行的开车称为()。...
Friday, September 16, 2022
问题:由于混流泵叶轮长期浸入水中,所以不会产生气蚀现象...
Friday, September 16, 2022
问题:三相异步电动机旋转磁场的转数,与电源频率和电动机的极数有什么关系?...
Thursday, September 15, 2022
Tuesday, September 20, 2022
Thursday, September 22, 2022
Thursday, September 22, 2022
Thursday, September 22, 2022
问题:选矿是根据矿石的矿物性质,主要是不同矿物的(),采用不同的方法,将有用矿物与脉石矿物分开,并使各种共生的有用矿物尽可能相...
Thursday, September 22, 2022
Thursday, September 22, 2022
问题:液压油的润滑性()对三大泵类减磨效果顺序是(叶片泵>柱塞泵>齿轮泵)。...
Thursday, September 22, 2022
问题:当水流某处的压力低于汽化压强时,水在该处汽化,对水流和附近管壁造成的破坏作用叫()。...
Thursday, September 15, 2022
问题:止水安装设的部位不同、可分为()()()、()四种...
Friday, September 23, 2022
Thursday, September 22, 2022
Thursday, September 22, 2022
Thursday, September 22, 2022
Thursday, September 28, 2023
问题:填空题把两组叶轮的进水方向相反地装在轴上,其轴向推力相互()。...
Wednesday, November 8, 2023
问题:()是指污水管网汇水面积上的径流量与该面积上降雨量之比。...
Thursday, September 22, 2022
问题:离心式水泵的关闭扬程比同一台水泵的工作扬程()。...
Friday, September 16, 2022
问题:问答题离心泵运行中轴承发热的主要原因及解决故障的相应措施?...
Sunday, December 18, 2022