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Old 08-10-2001, 08:41 PM
Benzmac Benzmac is offline
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Join Date: Mar 1999
Location: Suwanee, GA, USA
Posts: 4,712
The needle that goes through the center of the valve opens and closes according to the temperature of the gasses flowing through it. The tube at the top is so they can fill it under pressure.
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Donnie Drummonds
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