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Windmills were first used many centuries ago to help grind grain, and they still were being used for that task in the 1800s. Such windmills had sails attached to a vertical shaft, which in turn was attached to a grinding stone; as the sails turned the stone, the grain was ground.

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Today, the windmill's modern equivalent - a wind turbine - can use the wind's energy to generate electricity. Wind turbines, like windmills are mounted on a tower to capture the most energy.

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Barbed wire was the first wire technology capable of restraining cattle. Wire fences were cheaper and easier to erect than their alternatives.

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this is used to construct inexpensive fences and is used top walls surrounding secured property. It is also a major feature of the fortifications in trench warfare

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The First Transcontinental railroad was built crossing the western half of America and it was pieced together between 1863 and 1869. It was 1,776 miles long and served for the Atlantic and Pacific coasts of the United States to be connected by rail for the first time in history.

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A train is a form of rail transport consisting of a series of connected vehicles that usually runs along a rail track to transport cargo or passengers.