Drilling rig is described as a structure, which drills Wells in the bottom in order to search for oil.

-see also:
"Drilling rig" is in the UNSPSC Code "20122810"
  Drilling rig ships
Ref: 123289/2006-09-26

Other Database Pages Exist for this Phrase:
Drilling (Drilling -is described as the use of such a ...)

Alternative Spellings (Synonyms): rigs

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