... comfort and safety, construction elevator on the site with the tower crane is usually used, generally 1-3 tons of load, ... call. 5, drive power, running speed and high efficiency. 6, zero, parts interchangeability, passenger and cargo dual machine part ... safe and reliable; 5, small footprint, only 24 square meters; 6, smooth transmission, vibration, ride comfort; 7, lightweight structure, maintenance ...