
Commutator
Electrical Reversal
Refers to changing current direction in motors or generators to maintain rotation.

When the commutator wears out, the motor will begin to malfunction.
Machine Maintenance
Mentioning a commutator often implies the need for electrical maintenance or repair work.

He spent the afternoon repairing the commutator to get the generator running.
Physical Component
In engineering context, 'commutator' is a tangible part of a machine's hardware.

We had to order a new commutator for the old electric train set.
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