At present, the company mainly produces the total quality of more than 4.5 tons of medium trucks, the customer groups are mainly urban and rural medium and long distance transport vehicles. In the past two years, the market demand has been declining gradually, and it is expected that there will not be a substantial increase in large-scale steel foundry plants in the future. As the ceaseless improvement of rural roads, load 1-3 tons of light vehicle has become a most farmers replacing the three-wheeled vehicles, its comfort, security, and cargo capacity a three-wheeled vehicles have greatly improved, the price between 3-50000, for the purchasing power of ordinary rural households is acceptable, has great market demand space and potential. At the same time, it is also a high-tech enterprise, top 100 independent innovation enterprises, top 50 petrochemical forging and casting distinguishing equipment enterprises, and key energy equipment enterprises in Hebei Province. The original value of fixed assets of the company is 343.51 million yuan. In 2010, under the strategic deployment of vigorously developing and expanding the equipment manufacturing industry, the enterprise realized an output value of 641.23 million yuan and paid 50.52 million yuan in taxes and fees. Our company has now entered the critical stage of the development and improvement of LNG related storage and transportation equipment, during which we have encountered many difficulties, mainly the key technology is difficult to break through, and we urgently need technical guidance from experts. The main technical problems encountered are as follows :1)LNG refueling truck project: tank structure: mainly including internal support structure, tank pipe connection and heat insulation coating; Liquid metering: mainly includes the measurement of the amount of liquid added in the process of adding liquid; Control system: the control system is the key to complete the whole equipment refueling process of casting parts, how to accurately complete the refueling command is an urgent difficulty to break through.