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Paul Meierhans makes Emil Keller the honorary president of NOK 1961.
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Paul Meierhans makes Emil Keller the honorary pres...

Pressurized water pipeline, Morel power station 1944.
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Pressurized water pipeline, Morel power station 19...

Monitoring center of the Schaffhausen power station 1965.
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Monitoring center of the Schaffhausen power statio...

Transformer station Brederis 1959.
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Transformer station Brederis 1959.

Chatelot dam 1953.
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Chatelot dam 1953.

Turbine room Morel power station 1944.
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Turbine room Morel power station 1944.

Thomas Alva Edison
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Thomas Alva Edison