Jining DMJ Machinery Co., Ltd can design, manufacture and sales semi trailer suspension (American, German, bogie, air suspension), axle (American axle, German axle) and landing gear . At the same time king pin, air chamber, fifth wheel, container lock,can be provided with good quality and competitive price.We have many years of production and sales experience. We have achieved the permit of import and export, and exported to 32 countries in North Africa, South America, Middle East, Southeast Asia.