A switching device used to open an electric circuit when there is no current through it. They are used to isolate a part of an electrical system to allow the maintenance staff a safe access to it.
An electrical actuator that allows a relatively small electrical voltage or current to control a larger voltage or current.
A track and field discipline where runners take turns in carrying a baton from start to finish. Most common events are 4x100 meter and 4x400 meter competitions.
A series of vehicles travelling in sequence.
A new set of horses kept along a specific route so that they can replace animals that are tired.
A new set of hounds.
A new set of anything.
To pass on or transfer (information).