Final answer:
Tube trailers are designed to transport compressed gas, which allows for efficient and safe movement of large volumes of gas for various industrial and medical uses.
Step-by-step explanation:
Tube trailers carry compressed gas. These are specially designed trailers that transport gases that are under high pressure.
The gases can be used for various industrial applications, including medical purposes, welding, and as fuel for vehicles or in industrial processes. Compressed gas is an efficient and safe way to transport large volumes of gas, as the compression reduces the volume the gas occupies, thereby allowing for transport of larger quantities.