How do you know whether the elevator around you is reliable?

In the US, often there will be many different types of high lift products, these products are for human life to provide convenient and developed, and as the elevator itself, but in the process of human activities on the stairs and other goods transport, play an important role. However, the safe use of elevator has become a hot word in society, and has attracted a great deal of attention. In the face of the frequent elevator accidents, how can ordinary people know whether their elevators are enough? In fact, there are a few small ways to help you judge the quality of the elevator.
1. Observe the response speed of the elevator. When you press the elevator, can the elevator respond immediately and close the door. If the action is slow and the reaction is slow, it means that the lifespan of the elevator has been quite large, and even there may be a problem on the structure.
2, feel the vibration of the elevator operation. When the elevator is moving up or down, is there any shaking or unstable condition of the car? Generally, the elevator with high quality will not vibrate, and it will be comfortable to ride.
3, look at the elevator emergency equipment configuration. The general reliability of the elevator products will be installed with a type of emergency escape equipment to help the people to escape when the accident occurs.