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the spirit level and the water prisoned inside

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what about the air inside?

While using a spirit level today I thought: what a nice invention. Also crossed my mind: the water inside is cut from the other water. I wonder when it will join the family ? On the other hand the other elements of the spirit level are also (far) away from their kind.

see also

— Erkan Yilmaz (talk) • 20:51, 18 October 2009 • 5 comments

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