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A: A welding certification lets employers know that you have successfully completed a practical test of your ability to perform one type of sound weld in accordance with industry standards.

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Smelting is a process of applying heat to ore in order to extract out a base metal.It is a form of extractive metallurgy.It is used to extract many metals from their ores, including silver, iron, copper, and other base metals.

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Rolling (metalworking) - Wikipedia

The invention of the rolling mill in Europe may be attributed to Leonardo da Vinci in his drawings. The earliest rolling mills in crude form but the same basic principles were found in Middle East and South Asia as early as 600 BCE.

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Brighton Tru-Edge » Resources

In ferrous materials, heating to a temperature above the critical temperature, holding for a specified time and cooling at a suitable rate in order to soften and produce desired changes in other properties as well as the microstructure.

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The future of automotive lithium-ion battery recycling: Charting a sustainable course