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Edison in his Lab
UMG24A34_171

Edison in his Lab

Thomas Alva Edison (1847-1931) was an American inventor. In 1879, he produced the forst
UMG24A08_266

Thomas Alva Edison (1847-1931) was an American inv...

September 1996 - Electric power plant (Providence, Rhode Island)
UMG22A57_227

September 1996 - Electric power plant (Providence...

Switching equipment
UMG22A22_214

Switching equipment

Transferring power from the solar cells to the power grid
UMG22A01_239

Transferring power from the solar cells to the pow...

President tito and gheorghe gheorghiu dej acknowledging citizens' cheers at the mass meeting at kladovo marking the beginning of the works on the iron gates hydro-electric power plant, sep, 7, 1964.
UMG20A99_146

President tito and gheorghe gheorghiu dej acknowle...

A model of the bratsk hydro-electric power plant on display at the ussr agricultural exhibition and the ussr industrial exhibition in moscow, 1957, the plant has a capacity of 204,000 kw, at the time,...
UMG20B00_175

A model of the bratsk hydro-electric power plant o...

Turbines 1930
UMG20A61_197

Turbines 1930