power train

noun
a train of gears and shafting transmitting power from an engine, motor, etc., to a mechanism being driven.

Origin:
1940–45

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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WordNet
power train

noun
wheelwork consisting of a connected set of rotating gears by which force is transmitted or motion or torque is changed; "the fool got his tie caught in the geartrain" [syn: gearing
WordNet® 3.0, © 2006 by Princeton University.
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Example sentences
In practice this is the same power train of diesel-electric locomotives for long haul freight trains.
It only has power and control cables between each of its power train modules.
High performance power train provides high engine horsepower and torque.
The transmission concepts in many of these machines do not allow an efficient power train control including energy recovery.
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