Fuel injection system and Mechanical system

Fuel injection system noun - Mechanical system to inject atomized fuel directly into the cylinders of an internal-combustion engine; avoids the need for a carburetor.

Mechanical system and fuel injection system are semantically related. In some cases you can use "Mechanical system" instead a noun phrase "Fuel injection system".

Mechanical system noun - A system of elements that interact on mechanical principles.

Fuel injection system and mechanical system are semantically related. Sometimes you can replace phrase "Fuel injection system" with "Mechanical system", this phrases are similar.