Ningbo Demy (D&M) Bearings Co., Ltd. is a leading manufacturer of ball & roller bearings and exporter of belts, chains and auto parts in China. We specialize in research and development of various kinds of high precision, non-noise, long-life bearings, high quality chains, belts, auto parts and other machinery & transmission products. We have supplied our products for more than 60 industries, including railway, automobile, metallurgy, heavy industry, petrol-chemical, military and other ...   |