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This is the latest technology adopted by the Western Countries, in which the pig tail. i.e. the copper wires are inserted in the brushes during the process of moulding itself and then the brushes are sintered in Inert Atmosphere Furnace, which ensures that the copper wire does not gets oxidized and also quality of Brushes remain intact. Nowadays almost all The Starter Motor Manufacturing companies have adopted these types of carbon brushes.
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