问题:在重浇轴瓦乌金前,应清理瓦胎,表面达到无锈点、污迹、杂物、露出金...
Friday, September 16, 2022
问题:什么叫热备用、冷备用、负荷备用、事故备用、检修备用和国民经济备用...
Friday, September 16, 2022
Friday, September 16, 2022
问题:UPS均以()负载为依据(即功率因素>=0.8),否则会造成不必...
Friday, September 16, 2022
Friday, September 16, 2022
Saturday, September 17, 2022
Friday, September 16, 2022
问题:具有流动性的物体称为流体,()和()都具有流动性。...
Friday, September 16, 2022
问题:凝结水泵很容易产生汽蚀和吸入空气,是因为该泵的吸入侧处于()状态...
Friday, September 16, 2022
问题:对于基本控制方案而言,内扰要用反馈克服,外扰要用前馈克服...
Friday, September 16, 2022
Friday, September 16, 2022
Tuesday, September 13, 2022
Friday, September 16, 2022
Friday, September 16, 2022
Friday, September 16, 2022
问题:空冷和氢冷发电机冷却器的布置有哪些形式?各有何优缺点?...
Sunday, January 1, 2023
Monday, September 12, 2022
问题:离心泵在流量大干或小于设计工况下运行时冲击损失()。...
Friday, September 16, 2022
问题:调速汽门油动机滑阀开汽门方向的行程比关汽门方向行程()。...
Friday, September 16, 2022
Friday, September 16, 2022