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  <!-- Himmel / Boden -->
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  <!-- Lüftungseinlass über der Erde -->
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  <!-- Schutzraum: Betonhülle -->
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  <line x1="246" y1="314" x2="270" y2="314" stroke="#C9A66B" stroke-width="3"/>
  <line x1="246" y1="328" x2="270" y2="328" stroke="#C9A66B" stroke-width="3"/>
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  <!-- Treppe + Stahltür (Zugang) -->
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  <!-- Innenausstattung: Liege + Tisch + Wasserkanister -->
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  <!-- Notstrom (Aggregat) -->
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  <path d="M516,378 l-6,10 h8 l-6,10" fill="none" stroke="#C9A66B" stroke-width="2.5" stroke-linejoin="round" stroke-linecap="round"/>

  <!-- Labels -->
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    <text x="276" y="92" font-weight="700">Lüftung &amp; ABC-Filter</text>
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    <text x="600" y="138" font-weight="700">Stahltür</text>
    <text x="600" y="156" font-size="12.5" fill="#5F6A72">Gesicherter Zugang</text>

    <text x="300" y="295" font-weight="700" fill="#1F2A33">Schutzraum</text>
    <text x="300" y="313" font-size="12.5" fill="#5F6A72">Aufenthaltsbereich</text>

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    <text x="496" y="452" font-weight="700">Notstrom</text>
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