alternation current circuit {= AC circuit}

earth circuit [= earth return circuit]

enlarged circuit and compensation circuit

single filip-flop circuit (sff circuit)

trip circuit and closing circuit

absence of commutator

AC commutator machine

AC commutator motor

AC commutator type exciter

aero inner communicator

airborne communicator

alternating current commutator machine

alternating current commutator motor

alternating current commutator type exciter

alternating-current communtator motor

alternating-current commutator

alternating-current commutator machine

ammeter commutator switch

anti commutator