Popcorn is a snack that many people like, but do you know how it is made? Although the technology has improved, there are machines that specialize in making popcorn. But at the beginning, popcorn was made with an old-fashioned popcorn machine, which is also a memory of many people. In recent years, this old-fashioned popcorn machine is not very common in China. But Americans are hooked on it, and they think it's just high technology.
Popcorn machines are generally on the street, standing next to a kindly man. With a loud noise, the white flowers of the popcorn were blown up. When Americans saw this, they were curious about this strange machine.
Americans especially want to know the principles of popcorn machines. This is very simple, that is, by heating and rotating, the pressure inside the popcorn machine is gradually increased. When the lid of the machine is opened, the high-pressure gas and popcorn inside it are blown up.
Although the principle is simple, the Americans are deeply attracted by the popcorn machine. So this popcorn machine is popular on the streets of the United States.
