QINGDAO OBT CO., LTD, founded in 1997, is the professional manufacturer and supplier of special spare parts of semi-trailer in the world, supplying to the world semi-trailer manufacturers and transportation operators with axle, suspension system, landing gear, fifth wheel, kin pin etc.     OBT locates in the north of China and covers a ground area of 20000 square meters and it owns over 500 sets of numerical control equipment and nearly 1,000 pieces various general production machineries. We also have the advanced equipments such as CNC horizontal lathe,vertical lathe, machining center, cylindrical grinder, one piece axle rolling mill, automatic heat treatment, IF induction hardening machine, CNC shear, bender and laser cutting and etc.     At the same time, we continue to devote to research and development of technology and keep pace with the world. So far, OBT has been monthly delivered to the USA, Europe, the Middle East, South America, South Africa and West Africa, more than 30 countries and enjoys good reputation. Moreover, we have achieved ISO/TS 16949 accreditation. Therefore we can give a warranty for each product we supply.    With the combination of modern equipments and advanced processing technology and perfect quality control system, we always adhere to the principle of "Top quality, reasonable price and good after service".