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Chongqing Tongsheng Electrical & Mechanical Research Institute is a hi-and-new-tech enterprise professionally engaged in researching, designing and making oil filter. It is the co-operative unit for criteria making on State Operative Oil Standard with the certificate of BS EN ISO 9001:2000. It is the only one unit to obtain the production permit certificate for making Explosion-proof Oil Filter in China. And it enjoys the only one recognized certificate of Advanced-Level Enterprise in this Profession issued by the State Bureau of Technical Supervision.
This Company has been engaged in the research, manufacture and development of equipment of oil purification for many years. It absorbs advanced technologies from home and abroad extensively. It has the vacuum purifying oil technology that is much advanced than that of any other similar enterprise in this profession in China. The company has obtained technology patent granted by the State and the products of this te