1wastewater treatment plant capacity
2nuclear power plant
3pump
4 percolation facility
5fish ladder
6 waste collection transport
7sewer system with heat exchanger
8solar power plant
9private service water system
10open-cut method of construction
11wastewater processing plant
12industrial service water system
13 dam with intake tower
14wind power station
15coal-burning power plant
16geothermal power plant
17power generation
18flue-gas purification plant
19chemical plant
20residue
21 recycling plant
22 gate