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| David Mohr presents his bamboo-reinforced concrete at the regional contest in Bonn | David Mohr wins the regional contest in Bonn (Source: Uni Bonn) | David Mohr at the state contest "Jugend forscht" (source: Bayer AG) |
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Katrin Spenst and Marie König with their award certificates at the regional contest in Bonn |
| Julia Hellmann setting up her exhibit at the regional contest in Bonn |  |
