Let me tell you today.
In the first century AD, the Greek Hiro invented an automatic device for selling holy water.
It is the earliest vending machine in the world.
In 1925, the United States developed a vending machine for selling cigarettes.
Since then, all kinds of vending machines have appeared.
The type, structure and function of modern vending machines vary according to the products sold.
Now do you understand vending machines?
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