| industry | number |
| electric power | 22 |
| steel | 20 |
| cement | 9 |
| coal | 6 |
| aviation | 4 |
| construction | 4 |
| petrochemical | 3 |
| nonferrous | 2 |
| shipping | 1 |
| communication | 1 |
| Other building materials | 1 |
| total | 73 |