填料又叫盘根,一般采用()浸油或石棉绳制作,根据使用情况及时更换。...
Wednesday, September 21, 2022
Friday, September 16, 2022
单选题煤矿井下远距离控制的额定电压,不得超过()V?A 12VB 36VC 127VD 380V...
Saturday, August 5, 2023
填空题水泵装置的工况点,实际上是在一个相当幅度范围内随()而游动的。...
Wednesday, November 29, 2023
Wednesday, September 21, 2022
Monday, September 19, 2022
Wednesday, September 21, 2022
简述流体的概念,作用于流体上的力、流体的最基本特征和主要力学性质?...
Thursday, September 22, 2022
Thursday, September 22, 2022
Wednesday, September 21, 2022
尼龙柱销式联轴器可用在高速(5000~8000转/分)的油泵上。...
Sunday, September 18, 2022
Friday, September 16, 2022
当电动机轴成温度超过最大允许值时应立即切断电源,停机检查。...
Thursday, September 22, 2022
阀门保养要求,阀门外露螺丝、()和螺母的接合部分,应保持清洁和良好的润滑。...
Thursday, September 22, 2022
计算题:某台泵每小时出水量640吨,耗电量为44度,求,1天的出水量、耗电量各是多少?单耗为多少?(取小数位后两位)...
Wednesday, September 21, 2022
Wednesday, September 21, 2022
问答题计算题:(A-A-014)某离心泵,型号为100Y─80,其入口管中介质流速为1.5m/s,试估算该泵排量大约是多少m3/h?...
Tuesday, October 18, 2022
单选题容积式泵是指利用()来输送液体的泵。A 叶轮速度B 泵缸内容积的变化C 叶轮速度变化D 叶轮叶片增减...
Monday, October 23, 2023
单选题不光滑,拉丝很长、有弹性、沾水捻fu化是()A 钙基脂B 钠基脂C 机械油D N4b机油...
Sunday, December 10, 2023
Wednesday, September 21, 2022