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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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B
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Ball_valve
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INFOTEXT
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1992-09-03
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263b
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9 lines
A ball valve is a valve that works by the
action of external pressure raising a ball
and thereby opening a hole. An example of
this is the valve used in lavatory cisterns
to cut off the water supply when it reaches
the correct level.
Subject by: Nathan Ludkin