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Scrap Metal Separation May Become Less Costly
2015-03-25来源:VOA
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appliance – n. a machine (such as a stove, microwave or dishwasher) that is powered by electricity and that is used in people’s houses to perform a particular job
accurate – adj. able to produce results that are correct; not making mistakes
ferrous – adj. of, relating to or containing iron
magnetic field – n. of or relating to a magnet or magnetism; the magnetic effect of electric currents and magnetic materials
frequency – n. the number of times that something such as a sound wave or radio wave is repeated in a period of time
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