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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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V
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Valve
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INFOTEXT
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1992-09-02
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245b
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8 lines
A valve is a device that controls the flow of
a fluid. Inside a valve, a plug moves to
widen or close the opening through which the
fluid passes. The valve was invented by US
radio engineer Lee de Forest (1873-1961).
Subject by: Shaun Jay