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Scientists consider that the oldest tools are known to the mankind are 2,600,000 years old. They were used by people in manual operations and that is why they were called hand tools. By the beginning of the Industrial Revolution, people had already devised simple hand tools for cutting and shaping materials. But in the 18th century there appeared machine tools that made mass production a reality in the 19th century.
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Where were the tools used and how were they called?
They were used in manual operations and were called machine tools.
They were used in machine operations and were called machine tools.
They were used in machine operations and were called hand tools.
They were used in manual operations and were called hand tools.