Underground means under the level of the ground; belowground storage areas; underground caverns.

It is a place or space beneath the surface of the ground; subterranean space.

See also:
"Underground" is in the NAICS Code "212112"
  (Bituminous Coal Underground MiningSubbituminous coal underground mining or mining and beneficiating)

"Underground" is in the UNSPSC Code "20102307"
  Underground mining service vehicle spare parts or accessories

Ref: 86266/2006-09-13

Other Database Pages Exist for this Phrase:
Underground storage tank (Underground storage tank is characterized as ...)
Underground transmission lines (Underground transmission lines are lines that are ...)
Bus (Bus is a term which can refer to: 1. A vehicle ...)
Mining (Mining refers to the science, technique, and ...)

List of books: Underground

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