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2012.39.0281 (Section ΝΝ 158)

Drain A, looking southwest ... AMS Horizontal (normal)

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2012.39.0282 (Section ΝΝ 159)

Drain A1, looking southwest. Tunnel at right ... AMS Horizontal (normal)

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2012.39.0283 (Section ΝΝ 160)

Drain A1 looking north. Tunnel at left ... AMS Horizontal (normal)