![](http://www.alamy.com/thumbs/6/2CB0BEA6-15FA-4587-9A5F-E14DE8D76DD5/GBEA4E.jpg)
transport / transportation, road, steam engine, detail, steam engine, steam engines, machine, machines, steam power, engineering, technology, technologies, valve, valves, historic, historical, 20th century, Additional-Rights-Clearences-Not Available
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Keywords: 20th, century, detail, engine, engineering, engines, historic, historical, machine, machines, power, road, steam, technologies, technology, transport, transportation, valve, valves