The built-in leg of the semi-trailer is the supporting device of the trailer. Its function is to support the ground when the tractor is unhooked from the trailer, to withstand the load of the front half of the semi-trailer, and to turn the handle to raise and lower the support device by two speeds, high speed. For no-load, low-speed gears are used for heavy loads. The built-in legs are gears inside the square legs of the legs, making the legs lighter.

Liangshan Jinhua Auto Parts Manufacturing Co., Ltd. is located in the famous Shuibo Liangshan. Liangshan is a Chinese special automobile industrial base named by the China Automobile Association. Its transportation special vehicles account for a quarter of the national total. The company is based on the geographical advantages of the industry. The marketing network covers the whole country and is exported to the international market. The company integrates product development, design, manufacturing and sales. The leading products include semi-trailer legs, trailer legs, mobile platform equipment legs, RV legs and boarding legs. There are more than 60 kinds of products in five series.

The company was founded in 2001. Since its establishment, the company has been pursuing the quality policy of “Jinhua Machinery, Pursuing Excellence” and dedicated to serving customers. The company has complete production equipment and sound management system, and has passed ISO9001 quality management system certification. The company has added a high-standard automatic leg production line with an annual production capacity of more than 30,000 pairs, and has enabled the safety inspection line of the support device of the measurement standard, thus ensuring the high-quality performance of the product more strongly.

At the beginning of the company's establishment, it has determined a high starting point and strict development ideas. It has brought together a group of experienced management personnel and product design technicians with semi-trailer parts manufacturing industry. It is a professional team integrating experience, ability and innovation, which has laid a solid foundation for the company's development. The company is willing to go hand in hand with the development of new and old friends in the automotive industry, sincere cooperation, honest operation, quality of survival, reputation to win the market, write brilliant development and entrepreneurship chapter, create a better tomorrow!