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Toroidal
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==Engineering== *[[Toroidal engine]], an internal combustion engine with pistons that rotate inside a ring-shaped cylinder *[[Toroidal expansion joint]], a metallic assembly consisting of a series of circular tubes used in high pressure applications *[[Toroidal inductors and transformers]], a type of electrical device using magnetic cores with a ring or donut shape *[[Toroidal propeller]], a loop-shaped propeller used in aviation and maritime transport *[[Toroidal reflector]], a reflector whose surface is a section of a torus which has a different focal distance depending on the angle of the mirror
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