Tuesday, September 20, 2022
Wednesday, September 14, 2022
Friday, September 16, 2022
Thursday, September 22, 2022
Saturday, September 17, 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
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:()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: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
问题:联轴器的间隙用塞尺测量,其最大误差应不大于()mm...
Thursday, September 15, 2022
问题:单选题离心式水泵的关闭扬程比同一台水泵的工作扬程()。A 高B 低C 相等...
Tuesday, August 8, 2023
Thursday, September 22, 2022
Thursday, September 28, 2023
问题:问答题一泵总的机械损失与轴功率的比值为0.30,容积效率为0.85,水力效率为0.88,求该泵的总效率?...
Friday, March 8, 2024
Thursday, September 22, 2022
Wednesday, September 21, 2022
问题:排水过程的检测仪表分为普通参数检测和有害气体检测。...
Tuesday, September 20, 2022
Thursday, September 22, 2022
Sunday, September 18, 2022
Thursday, September 22, 2022