Epicyclic gear train and Power train

Epicyclic gear train noun - A system of epicyclic gears in which at least one wheel axis itself revolves about another fixed axis.

Power train and epicyclic gear train are semantically related. In some cases you can use "Power train" instead a noun phrase "Epicyclic gear train".

Power train noun - Wheelwork consisting of a connected set of rotating gears by which force is transmitted or motion or torque is changed.

Epicyclic gear train and power train are semantically related. Sometimes you can replace phrase "Epicyclic gear train" with "Power train", this phrases are similar.