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Drilling

13 bytes added, 07:35, 2 March 2013
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*A [[#Oil Refinery|refinery]] can be built to convert petroleum into fuel and plastic.
Drilling also known as Petroleum is one of the [[City Specializations#big businesses|big business]] [[City Specializations|specializations]] with its own global [[leaderboards|leaderboard]].
==Petroleum Structures==
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