玻璃管是自然实验中常用的实验器材,但实验室中都是比较长的普通玻璃管,在课堂教学中使用不太方便,教师往往在课前要对这些玻璃管进行适当的加工,下面介绍几种玻璃管的加工技巧。在对玻璃管进行加工之前,教师先要准备好酒精喷灯、玻璃划刀穴小摊上推销的滚轮玻璃划刀、薄边的砂 Glass tube is commonly used in natural experiments experimental equipment, but the laboratory is relatively long ordinary glass tube, classroom teaching is not easy to use, teachers often before the class to be properly processed glass tube, the following Several glass processing skills. Before processing the glass tube, the teacher should first prepare the alcohol blowtorch, the roller glass knife on the glass swordshop stall, the thin edge sand