[问答题,简答题] 当湿空气达到露点时其相对湿度值为多少？

电动式时间继电器主要结构是什么？ 电泵入口压力低开关定制为（） ["0.6MPA","0.5MPA","0.4MPA","0.7MPA"] 电泵润滑油压力低开关定值为（） ["0.08MPA","0.07MPA","0.05MPA","0.04MPA"] 制冷系统试运行前的准备和检查工作有哪些？ 低加解列（）S后判断为RB失败 ["2000S","1000S","1500S","2500S"] 当湿空气达到露点时其相对湿度值为多少？