Central to Mid-levels escalator system in Hong Kong is currently the world's longest outdoor escalator system, escalator design, which connects the Central Business District and the Mid-Levels residential area. System total length of 800 meters, Haixing escalators, vertical gap of 135 meters, from the twenty electric escalators and three moving walkways components. System running in different directions in work in the morning and afternoon rush hour. From one end to the other end of the ride takes about twenty minutes. The world's second longest outdoor escalator system in Hong Kong Ocean Park. US capital of Washington underground railway station where a 70-meter long escalators, escalators, and is the Western Hemisphere's longest escalator alone. Prague subway station escalator with a length of 100 meters in 1998. Drive: drive device consists of a drive sprocket, sprocket rung, handrail driving sprocket wheel or ratchet spindle and brake components. The device obtains power from the driver, the drive chain for driving the steps and handrail in order to achieve the main motion escalator, and in an emergency brake, to prevent passengers from sliding and falling, to ensure the safety of passengers. The device is mounted on the platform (upper truss) and escalator construction, Noah Witt elevator (certified), Haixing escalator provided by the Texas Noah Witt Elevator Company. Texas Noah Witt Elevator Co. (www.dznywt.com) (www.dznywt.com) is an industry leader in Shandong Dezhou, machinery and industrial products, cooperation projects over the years, the company is implementing the scientific management, innovation and development, honesty and trustworthiness policy, and satisfy customer needs. Noah Witt Elevator leadership with the staff warmly welcome all inquiries negotiations to create Noah Witt elevator a better future.