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| Poros Building Drain, looking west ... AMS Horizontal (normal) ... Poros Building Drain, looking west. |
| Poros Building Drain, looking north ... AMS Horizontal (normal) ... Poros Building Drain, looking north. |
| Poros Building Drain, looking west ... AMS Horizontal (normal) ... Poros Building Drain, looking west. |
| Looking south, Poros Building Drain ... AMS Horizontal (normal) ... Looking south, Poros Building Drain. |
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