The project passed the product appraisal organized by the Department of Science and Technology of Anhui Province in April this year. The appraisal committee unanimously believed that this series of products has independent intellectual property rights, which fills domestic gaps and is at the leading level in the country. The study of the project also produced two utility model patents: First, the tractor's semi-automatic traction pin mechanism; the second is the transverse cylinder steering bridge with a disc brake. This series of products was sold in batches in May 2007, after approximately one year of small-scale trial sales. At present, China Railway Express has already ordered several orders for "Heli" 25-ton electric tractors. The market prospect of "Heli" 20 to 25 tons electric tractors is very broad.
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