The China Machine Tool Association of Powder Metallurgy (CMPMA) has been in friendly contact with the Japan Powder Metallurgical Industry Association (JPMA). Regularly exchange statistics on economic operations of the industry and exchange relevant information every year. For the comparability of statistical data, the data provided by CMPMA to JPMA has been 34 statistical member units, and the data included in the CMPMA table is only 34 statistical member units. The statistics of the two associations are published as follows, for the reader's reference only. 
Statistics on the production and application of parts and bearings of China Powder Machinery Metallurgy Professional Association and Japan Powder Metallurgy Machinery in the past three years