The phrase "a main section" is correct and usable in written English.
It can be used when referring to a primary or significant part of a document, article, or any structured content.
Example: "In the report, the main findings are presented in a main section that summarizes the key results."
Alternatives: "a primary section" or "a key section".
I'm not sure there is any obvious way of solving this apart from doodling on a piece of paper and then realising that you will need to have a room that has 'spikes' sticking out from a main section.
The new place offers two distinct dining possibilities: a main section with a copper-topped bar, a pressed-tin ceiling and antique hanging lights; and a dazzling white room featuring a wall of windows and sheer billowing material covering the ceiling.
The quality instrument consisted of four sections: a main section containing a generic checklist applicable to all studies, and three other sections specific to the type of study.
Its exterior is stucco over concrete block; the building has a main section with a round-arched asbestos-shingled roof, and is two stories high, five bays wide, and ten bays deep.
Typically this would comprise an intro, a main section (often incorporating a bass drop), a midsection, a second main section similar to the first (often with another drop), and an outro.
Before the Internet became a commerce medium and "technology" became a main section of just about every major news source, tangible tech was given to you as a necessity when, say, you started, a new job, but not as a holiday present for entertainment and enjoyment.
It was built in two different stages and includes a 35-by-60-foot 35-by-60-foot 35-by-60-foot 35-by-60-footto the rear, which was originally just a roof with four poles covering a picnic area, mainPellegrino section
Thailand, which has about the same land area as Spain or France, consists of two broad geographic areas: a larger main section in the north and a smaller peninsular extension in the south.
A hard-driving main section refuses to settle into a groove.
Slowly the music breaks into a wild, punchy main section.
Here's an example: The main section of the CR auto issue has 205 profiles of cars and trucks.
