To provide power.
The important point here about search results pages is that one main purpose of search engines is to provide searchers with relevant results.
In your carburetor. You have a main jet and an idle jet.
Google & Yahoo are two main search engines.
Bing, Google and Yahoo are the main search engines.
The two main types of rocket engines are Solid fuel rocket engines and Liquid fuel rocket engines.
They are the engines of photosynthesis.
The three main classes are the internal combustion engines, steam engines, turbine engines.
Yes
The purpose of the company Engines Marketer is to get their official site out to the public and well known. It can be beneficial to improve sales and get their reputation into the market.
2stroke
the main purpose of the crusades was to be themselves
the main purpose of the crusades was to be themselves