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Tag: electric trolley

Engines Podcast

Engines of Our Ingenuity 1416: Technology On Hold

Dr. John Lienhard

Posted on October 25, 2017 · Episode: 1416 Technology on Hold: ideas that return after a long time. Today, technology on hold.

Tags agriculture automobile ecology electric trolley environment farming feedback control fossil fuels hellenistic herbal medicine horse nuclear power power production public transportation water clock

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