luoyang bearing group co., ltd. (hereinafter referred to as luoyang) was founded in 1954 and is one of the 156 key projects in my country during the first five-year plan period. at present, it has become one of the comprehensive bearing manufacturing enterprises with the largest production scale and the strongest supporting service capabilities in my country's bearing industry. it still maintains many records in my country's bearing industry, including the highest bearing accuracy, the most complex structure and the largest appearance size.