Question

For harvesting machines used in paddy field wheels with wider chain are used
What is the scientific principle behind this​

Answer 1

Explanation:

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Answer 2

In 1800, something like 90 percent of the entire US population was employed working the land; fast-forward 200 years and you'll find only 2 percent of people are now working this way. What caused that amazing change in society? One important factor was the development of huge, automated machines such as combine harvesters that made each agricultural worker vastly more productive. Let's take a closer look at how they work!

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