Gallery Speleology in Bull Rock Cave
Günther Nouackh in diving suit 1913
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Members of GfH sdVDT with new diving suit made by Westfalia(1913)
The engine room placed before Shenk's Siphon 1912
The engine room placed in The Enrance Hall 1920-1922
Cavers struggle with floods
Cavers struggle with floods
Cavers struggle with floods
Cavers struggle with floods
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