One of the factors that can affect to the quality of lubricantion is metal particle content due to friction of engine parts. Metal particle in lubricanting oil could damage the engine parts. so it is neccessary to reduce the metal particle content which mingled in lubricant oil. The experiment was conducted in laboratory scale using power magnetic type ring neodymium possessing diamet... https://www.shineoners.shop/product-category/hair-accessories/