At present, large amounts of copper wire and iron are used in the stators and rotors of motors to push a magnetic field through air -- a poor conduit.
(large amounts of copper wire and iron; are used; L:in the stators and rotors of motors; to push a magnetic field through air; T:At present)
large amounts of copper wire and iron
are used
L:in the stators and rotors of motors to push a magnetic field through air T:At present