지면 아래에 위치하거나 매설된 것을 의미하는 'underground'의 약어.
An abbreviation for 'underground', referring to structures, systems, or activities located below the surface of the earth.
예문:
"The map indicates several ug storage tanks on the property."
"All ug installations must comply with local safety codes."
"The mining company specialized in ug resource extraction."