As we all know, the glass bottle we often use at ordinary times, anyone who carefully observes life will find this problem, that is, there will be threads on the mouth of the glass bottle. The purpose of threading is to make the bottle cap cover the bottle better, which is conducive to better preserving the food in the bottle. We will find that these threads are regular and hierarchical, so many people will question this question.
In fact, the threads on these glass bottles are all blown out by abrasive. With the rapid development of science and technology, science and technology play an important role in our daily life. These abrasives are all produced by machines, and machines can produce abrasives of this shape. When people make glass bottles, they can directly cover them with abrasive tools, so that the glass bottles can have molded threads.
In fact, this is similar to the abrasive tools used in construction. Many buildings we see now are very beautiful, such as the lines of corridors, balconies or roofs. These are not hand-made, but directly covered with molds, and then some raw materials for building can be put in, so that the restored building has various patterns. In fact, many things are made of molds. That's all I summed up.