How to fill in the name of the second category of enterprises

The second category of enterprises for: aviation, railroads, electricity, water transportation, automobile transportation industry, construction and installation industry, rolling, rolling processing, etc.. Classification of enterprises 1, a class: smelting, extraction, chemical raw materials and chemicals, loading and unloading industry, production, storage and transportation of flammable, explosive toxic, radioactive substances, etc. 2, two types: aviation, railroads, electric power, water transport, automobile transportation, construction and installation industry, rolling, rolling processing, etc.; 3, three types: machinery and equipment, instrumentation, building materials manufacturing industry, rubber and plastic products industry, timber processing industry, Chemical fiber manufacturing, glass enamelware manufacturing, shipbuilding industry, water production, warehousing, geological surveys, etc.