The invention relates to a pre-assembly wall for practice facilities or for intensive care or inpatient hospital rooms, characterized by carrier rails, cantilevers that can be suspended in the carrier rails and have means for fastening supply lines, media modules that can be connected to the supply lines, and wall panels, wherein the media modules and wall panels can be attached to the cantilevers and together form an interior wall surface, behind which the supply lines are located. The media supply system meets the multifaceted demands on supply elements in the form of a product system and has relatively low production costs and low installation effort.
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