A technical drawing, likely a blueprint or architectural plan, detailing an underground network of tunnels or conduits. It shows a complex arrangement of rectangular chambers, interconnected by curved and straight pathways. Dimensions and labels are present throughout the drawing, indicating lengths and possibly pipe sizes or structural elements. There are also circular elements and what appear to be access points or junction boxes. The overall impression is a detailed layout of an infrastructure system.
documents/EFTA00561677.pdf
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