在工矿企业中,常会遇到玻璃管需要割断(包括玻璃瓶的割断)。小玻璃管可用硬质油石、砂轮或锉刀,锉一条痕迹后,用手一掰便可。若遇到短而粗的试管或瓶子的割断,那就不是轻而易举的。有的采用钢板轮外加金刚砂和水进行磨削。这种方法太费工,有的单位还没有条件采用。而用玻璃刀 In industrial and mining enterprises, often encounter the need to cut the glass tube (including glass cut off). Small glass tube available hard whetstone, grinding wheel or file, file a trace, you can use a hand to break. It is not easy to cut a short, thick test tube or bottle. Some use steel wheel plus emery and water for grinding. This method is too laborious, and some units have not yet used the conditions. And with a glass knife