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 ...