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Mechanical engineering is a broad field that traditionally comprises three primary subfields:
energy, mechanisms and machinery, and manufacturing. The work done by mechanical engineers
includes the design, construction, and use of systems for the conversion of energy available from
natural sources (water, fossil fuels, nuclear fuels, solar radiation) to other forms of useful energy
(for transportation, heat, light, power); design and production of machines to lighten the burden
of servile human work and to do work otherwise beyond human capability; processing of
materials into useful products; and creative planning, development, and operation of systems
using energy, machines, and resources.
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