What kind of elevator .. What are the advantages and disadvantages of these elevators .. What are the characteristics of the brand of elevator and the patent problem added: the first floor is too general. Please elaborate.
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Learning ... ..., the second floor of the answer is good Oh!
Now the market elevator conventional two: a hydraulic elevator; a traction elevator; hydraulic elevator on the shaft requirements are relatively low, such as the top floor height, the top floor room, as well as energy saving, etc., traction elevator is the most conventional, he is through Hoisting machine to promote the cable to enhance, relatively speaking on the hoistway requirements are relatively high, the top level is usually 4.5 tigers harbor Hong Kong guest nine song attack at the end of the meter, the hydraulic as long as 3.3 meters, the other cable every 2 years as needed to be replaced. Both elevators are very safe and have national manufacturing standards. Hydraulic ladder is not afraid of high fear, traction ladder afraid of fear of high.
