Pushing this switch completes the electrical circuit that supplies electrical current from the battery to the coil of wire that surrounds the magnetic compass.
(Pushing this switch; completes; the electrical circuit that supplies electrical current from the battery to the coil of wire) (the electrical circuit; supplies; electrical current; from the battery to the coil of wire) (the coil of wire; surrounds; the magnetic compass)
Pushing this switch the electrical circuit the coil of wire
completes supplies surrounds
the electrical circuit that supplies electrical current from the battery to the coil of wire
electrical current from the battery to the coil of wire
the magnetic compass