A redline drawing is a revision of an existing engineering or architectural drawing. It is typically marked up with red ink to indicate changes that need to be made to the original drawing. The changes can be additions, deletions, or modifications to dimensions, notes, or other details on the drawing. Redline drawings are used to communicate changes between design teams, project managers, or manufacturers. They are also commonly used in construction projects to ensure that everyone is aware of any changes that have been made to the original plans.
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