duct

A pipe, tube or canal which carries gas or liquid from one place to another.

heating and air-conditioning ducts

The three motors on each bogie are force ventilated from a blower mounted in the adjacent nose-end compartment of the superstructure, the air being led by ducts and flexible bellows connections to the air inlet at the commutator end of the motor.

A pipe, tube or canal which carries gas or liquid from one place to another.

A pipe, tube or canal which carries gas or liquid from one place to another.

A pipe, tube or canal which carries gas or liquid from one place to another.

A layer (as in the atmosphere or the ocean) which occurs under usually abnormal conditions and in which radio or sound waves are confined to a restricted path.

To enclose in a duct.

To channel something (such as a gas) or propagate something (such as radio waves) through a duct or series of ducts.