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  2. Begehung vor Ort

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  3. Begehung vor Ort

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  4. Determine whether buildings are fully underground

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  5. Details verbessert

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  6. Details verbessert

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  7. Survey if places still exist

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  8. Details verbessert

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  9. Details verbessert

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  10. Details verbessert

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  11. Details verbessert

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  12. Details verbessert

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  13. Details verbessert

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  14. Details verbessert

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  15. Details verbessert

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  16. Details verbessert

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  17. Details verbessert

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  18. Details verbessert

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  19. Details verbessert

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  20. Details verbessert

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