portswap.com Portland's online swap meet buy sell trade anything upload videos adult ads as well http://www.portswap.com en_US The precise wire wound variable resistor <p>The base of the precise wire wound variable resistor is used aluminum alloy. Plastic is easy to be processed into various shapes, mechanical and electrical performance is good, and the price is low, light weight, corrosion resistance, so the solid core in organic synthesis, synthetic carbon film and general line around the variable resistor in heavy use. 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