介绍三种自制教具——泡沫塑料试管架,霍夫曼电解器,酒精吹管灯

• 作 者: 孙公望
• 出 处: 江苏教育
• 发表日期: 2004年期
• 关键词: 试管架 电解器 管支架 自制教具 霍夫曼 橡皮塞 细齿 镍电极 湍流火焰 碱液

(一)泡沫塑料试管架供包装用的废泡沫塑料,很易加工制成各种实验用支架。图1是用废泡沫塑料制成的试管架或U形管支架。制作这些仪器需要的工具是:细齿钢锯条、小木锉或砂皮纸。主要的技术问题是如何粘接。现介绍如下:在窗玻璃

(A) foam test tube rack For the packaging of waste foam, it is easy to process into a variety of experiments with the stent. Figure 1 is a test tube rack or U-tube rack made of waste foam. The tools needed to make these instruments are: thin-tooth hacksaw blades, small rasps or sandpaper. The main technical issue is how to bond. Now introduced as follows: in the window glass