... lifting equipment,which can be mounted on singlebeam,bridge,gantry and arm cranes. With slight modification,it can also be used ... speed. At a low speed,it can do precise loading and unloading, mounding of sand box, maintenance of machine tools,etc. 3. ... wire rope hoists have two speeds,make it lift steadily and accurately.5.Protection: Load limter,traversing limter,Low electric power ...