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double valves |
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double valves [¦dəb·əl ′valvz] (petroleum engineering) Two valves in series used as subsurface traveling or standing valves in wells, the dual arrangement being more reliable than a single valve. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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