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external fixator
external respiration
external shock
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external-combustion engine

ex·ter·nal-com·bus·tion en·gine (plural ex·ter·nal-com·bus·tion en·gines)


noun 
Definition:
 
engine using heat from outside: an engine that converts into power heat generated from fuel consumed outside the engine, e.g. a steam engine.
See also  internal-combustion engine


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