Lubricating system and Mechanical system

Lubricating system noun - Mechanical system of lubricating internal combustion engines in which a pump forces oil into the engine bearings.

Mechanical system and lubricating system are semantically related. In some cases you can use "Mechanical system" instead a noun phrase "Lubricating system".

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

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