将两根同样内径的厚玻璃管以厚橡皮管连接起来,平行地固定在支架上,可作“使饱和汽变未饱和汽”的实验。开闭装置就是在玻管顶端装一小段硬橡皮管,皮管上加两个螺旋夹子。(图1) 实验之先,要做好这样的准备工作。提高右侧开管,使水 Two thick glass tubes of the same inner diameter are connected with a thick rubber tube and fixed in parallel to the support, so as to make an experiment of “making saturated vapor unsaturated steam”. Opening and closing device is installed at the top of the glass tube a short section of hard rubber tube, tube plus two spiral clamps. (Figure 1) Before the experiment, to do a good job of this preparatory work. Raise the right open tube to make the water