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578 320x240 roof, architecture, structure
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1698 320x240 roof, architecture, beijing national stadium
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1667 320x240 roof, ceiling, architecture
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1929 320x240 roof, architecture, sky
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1754 320x240 roof, glass, lines
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2329 320x240 roof, circle, relief
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1911 320x240 roof, lines, intersections
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4453 320x240 roof, bamboo, rope
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2326 320x240 roof, pipes, ceiling
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1510 320x240 roof, arch, pattern
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2113 320x240 roof, structure, sky
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2558 320x240 roof, building, architecture
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2721 320x240 roof, architecture, sky
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1832 320x240 roof, architecture, relief
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2136 320x240 roof, building, relief