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  UndergroundArea

Sigma KEE - UndergroundArea

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A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
underground area
The class of regions located Below the surface of the earth.
Relationships      
Parents geographic area A geographic location, generally having definite boundaries. Note that this differs from its immediate superclass Region in that a GeographicArea is a three-dimensional Region of the earth. Accordingly, all astronomical objects other than earth and all one-dimensional and two-dimensional Regions are not classed under GeographicArea.


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