Disclosed is a copper foil for a negative electrode collector capable of simultaneously achieving high capacity and long life charge/discharge cycles in a secondary battery, wherein the front and back surfaces are of a uniform shape and, for example, the p...

A novel exhaust gas guide assembly with an improved high-temperature sliding wear resistance, oxidation resistance, high-temperature strength or the like for a VGS turbocharger is provided. The invention is characterized in that a surface modification is a...