These drawings are an example of very precise, production ready, CAD drawings. These use an Isometric exploded projection to show each individual component, including exact fixing points (screw hole positions, rebates, etc).

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The drawings are sent to a factory for cutting and assembly, so is used for large runs of furniture production.

The image below shows the ISO projection CAD drawings which for production, is accompanied by a full table of components, materials and exact sizes [click images for a large view]