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____ compressors are usually used in large installations.
Contour Map
A map marked with lines that represent equal elevation points, used to show the shape and elevation of land surfaces.
Water Table
The upper level of an underground surface in which the soil or rocks are permanently saturated with water, marking the boundary between groundwater and surface water.
Elevations
Refers to the heights of landforms relative to sea level or ground level.
Contour Lines
Lines on a map that represent areas of equal elevation, indicating the shape and steepness of the terrain.
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