According to the National Bureau of Statistics of the National Economy Industry Classification and Code, China's elevator industry is categorized as general equipment manufacturing (NBS code C34) in the material handling equipment manufacturing (NBS code C343), its statistical level 4 code C3435.
Two, the elevator refers to the service of a number of specific floors of a building, and its car running on at least two rows of rigid track movement perpendicular to the horizontal plane or with the plumb line inclined at an angle of less than 15 ° permanent transportation equipment.
Also step type, tread plate mounted on tracks running continuously, commonly known as escalators or moving walkways. Fixed elevating equipment that serves a defined floor. Vertical elevator has a car, running in at least two vertical or inclined angle of less than 15 ° between the rigid guide rail. Car size and structural form to facilitate passenger access or loading and unloading of goods.
Expanded information:
I. This standard adopts the principle of homogeneity of economic activities divided into National economic industry. That is, each industry category is divided according to the nature of the same economic activity, rather than on the basis of the preparation, accounting system or sectoral management.
II. According to the United Nations' International Standard Industrial Classification of All Economic Activities (ISIC), the unit of industrial activity and the legal entity are mainly used as the units for dividing industries. The use of industrial activity units to classify industries is suitable for production statistics and other statistical surveys that do not target assets, liabilities and financial status; the use of legal entities to classify industries is suitable for statistical surveys that target assets, liabilities and financial status.
Three, the elevator is mainly by the traction machine (winch), guide rail, counterweight device, safety devices (such as speed limiters, safety clamps and buffers, etc.), signal manipulation system, car and hall door and other components.
These parts are installed in the building's shaft and machine room. Usually use wire rope friction drive, wire rope around the traction sheave, both ends are connected to the car and balance weight, motor drive traction sheave to make the car lift. The elevator requires safety and reliability, high conveying efficiency, accurate leveling and comfortable ride.
Baidu Encyclopedia - Elevator
Baidu Encyclopedia - National Economic Industry Classification (NEC)