Nanjing High Speed & Accurate Gear (Group) Co., Ltd., a wholly owned subsidiary of Nanjing High Accurate Drive Equipment Manufacturing Co., Ltd recently has signed a contract for one set of test bench gearbox. The gearbox is required to be designed as three-stage of parallel shaft transmission with twin input single output. The maximum output torque is 700 ton meters, and the weight is over 220 tons, which will break the domestic record for the heaviest gearbox. The design has already been approved by the client.