一、冷凝管的代替装置在学生分组实验初中化学(1954年2月出版)145页实验二时,常会有冷凝管的缺少或不足,按146页图85所示的冷凝管装置,仪器室内也常会因缺少外面的粗管而感困难,现在我们可按下面的装置来进行实验。图1。按图装置时曲成的C管的ab最好短些, A condenser instead of the device in the grouping of students in junior high school chemistry (published in February 1954) 145 Experiment two, there will often be lack of or lack of condenser, as shown in Figure 85 on page 146 of the condenser tube device, the instrument room Often because of the lack of thick outside the tube and feel difficult, and now we can follow the device to experiment. figure 1. Equipment by the map when the song of C tube ab is the best short,