A tube, a pipe, or a hole.
An abnormal connection or passageway between organs or vessels that normally do not connect.
The tube through which the wine of the Eucharist was once sucked from the chalice in certain ceremonies (such as papal Masses).
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.