torricellian chamber

sub-atmospheric pressure air space in a cave or other flooded enclosure

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Wikidata

air trap  class, cave, penetration diving, diving hazards

• Freebase entry^@

Countries:

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• All subterranean sites

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• Alamy
• Flickr
• Google Books
• Library of Congress
• Online Books
• Reasonator
• Tripadvisor
• Wikimedia ViewIt
• Wikimedia
• YouTube
• other websites

Frameless

Type	Date	Description	Keywords	Notes	Source
link		Freebase entry@			Wikidata