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The Epic Interactive Encyclopedia 1998
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Epic Interactive Encyclopedia, The - 1998 Edition (1998)(Epic Marketing).iso
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L
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level,_or_spirit_level
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1992-09-01
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236b
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7 lines
A simple instrument for finding horizontal
level, used in surveying and building
construction. It consists of a coloured
liquid in a glass tube, in which a bubble is
trapped. When the tube is horizontal, the
bubble moves to the centre.