A system of ducts for cables, heating or ventilation.
The movement of containers or packages between a terminal and a transporter's inland facilities, or the scheduled transportation service between locations.
All the electrical and communications cables bundled together and distributed through a building.
Plastic conduit or duct used to conceal and protect electrical wiring.
A two-way radio technique that uses a control channel to automatically assign frequency channels to groups of user radios.
A vessel with a broad mouth at one end, a pipe or tube at the other, for conveying liquor, fluids, etc., into casks, bottles, or other vessels; a funnel.
An underground or underwater passage.
A passage through or under some obstacle.
A hole in the ground made by an animal, a burrow.
A level passage driven across the measures, or at right angles to veins which it is desired to reach; distinguished from the drift, or gangway, which is led along the vein when reached by the tunnel.
The opening of a chimney for the passage of smoke; a flue.
A wrapper for a protocol that cannot otherwise be used because it is unsupported, blocked, or insecure.
Anything that resembles a tunnel.
To make a tunnel through or under something; to burrow.
To transmit something through a tunnel (wrapper for insecure or unsupported protocol).
To insert a catheter into a vein to allow long-term use.
To undergo the quantum-mechanical phenomenon where a particle penetrates through a barrier that it classically cannot surmount.
To dig a tunnel.