English English OFC is C11000 wikipedia oxygen-free copper http://en.wikipedia.org/wiki/Oxygen-free_copper oxygen-free oxygen-free http://en.wikipedia.org/wiki/Oxygen-free_copper http://en.wikipedia.org/wiki/Oxygen-free_copper http://en.wikipedia.org/wiki/Oxygen-free_copper OFC oxygen-free copper oxygen-free Oxygen-free copper - Wikipedia, the free encyclopedia http://en.wikipedia.org/wiki/Oxygen-free_copper http://en.wikipedia.org/wiki/Oxygen-free_copper oxygen-free copper OFC