A rigid tube that transports water, steam, or other fluid, as used in plumbing and numerous other applications. [from 10th c.]
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_:vb6868770
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A standard Flight Refuelling Ltd Mk 8 probe nozzle was attached to the probe structural tube and fuel pipe. The pipe was double-walled, and passed through into the fuselage aft of the flight deck; […] A non-return valve was fitted within the fuel pipe aft of the probe nozzle, thus preventing any leakage of fuel if the aircraft lost the probe nozzle inadvertently.
dcterms:bibliographicCitation
2006, Richard M. Tanner, “Lockheed Tristar: Single-point Tanker”, in History of Air-to-air Refuelling, Barnsley, South Yorkshire: Pen & Sword Aviation, Pen & Sword Books, →ISBN, part 2 (Technology), page 286, column 1: