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The image displays a projected educational presentation in a yellow-toned environment within Chongqing Engineering Vocational College, located in Jiangjin, China. The central subject is a large screen exhibiting a PowerPoint slide titled "IV. Calculation of Load," featuring a graphic labeled "02 Examples of Load Calculation." The slide details "Example 1.1," an engineering problem focused on calculating the uniform line load of an office building's roof slab. Specific parameters provided include precast slab dimensions (3.60m length, 1.20m width), a deadweight of 11.02kN, roofing specifications (two felts, three oil layers paved with small stones at 0.35kN/m2), a 20mm thick cement mortar leveling layer (density 20kN/m3), and a 20mm thick plastering board bottom (density 17kN/m3), with a standard roof live load of 0.7kN/m2. The projected interface's top bar shows menus in Chinese characters, indicative of Microsoft PowerPoint. A white projector, mounted on the ceiling or high wall, is visible above the screen with cables attached. In the lower right foreground, a dark silhouette of a person's head and shoulder is partially visible, indicating an observer's presence.
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