Changsha Aobo Carbon Co., Ltd, which was established in 2008, specialized in developing and making all types of electrical carbon and mechanical carbon brush. With painstaking efforts, we have become one of the major carbon manufacturing enterprises in Hunan Province of China. Our products are widely used in railway, metallurgy, energy source, architecture material, machine manufacture and automotive transportation. They sell well in 20 provinces, cities and autonomous regions at home, and are ...