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• Duplex locomotive — This article is about a type of locomotive. For the Austrian experimental 4 cylinder locomotive, see Locomotive Duplex. Closeup of the second set of cylinders on the PRR S1. A duplex locomotive is a steam locomotive that divides the driving force …   Wikipedia

• 2-8-4 — In the Whyte notation, a 2 8 4 is a railroad steam locomotive that has one unpowered leading axle followed by four powered driving axles and two unpowered trailing axles. This locomotive type is most often referred to as a Berkshire, though the… …   Wikipedia

• Cylinder head porting — refers to the process of modifying the intake and exhaust ports of an internal combustion engine to improve the quality and quantity of the air flow. Cylinder heads, as manufactured, are usually suboptimal due to design and manufacturing… …   Wikipedia

• Aerial refueling — A C 17 Globemaster refuels through the boom of a Boeing KC 135 Stratotanker …   Wikipedia

• Cunning folk in Britain — A model of a nineteenth century cunning woman in her house, at the Museum of Witchcraft, Boscastle in England. The cunning folk in Britain were professional or semi professional practitioners of magic active from the Medieval period through to… …   Wikipedia

• Detroit Diesel 110 — The Detroit Diesel Series 110, with 110 cubic inches displacement per cylinder, was introduced in 1945 as more powerful alternative to the existing Series 71 engines. It was used in a variety of applications, including construction equipment and… …   Wikipedia