Power Plants, 1934. From the atlas "Industry of the USSR at the beginning of the 2nd Five-Year Plan. Geographical atlas." Conventional signs: borders (5 types), settlements (7 groups), railways (operating, under construction); types of power plants (12 types), combined heat and power plants (2 types), energy sources for the power plant (5 types), power plant capacity (3 gradations); The numbers indicate the serial numbers of the power plant in the list (Appendix: List of industrial enterprises to the Atlas. M., 1934).