Выражение встречается в следующем контексте: про смазку частей двигателя. Поворачивают рычаг управления, и нужно открыть kingston cock????

Заранее спасибо

In valves:

* A type of tap, faucet or valve
* Steam cock, a drain valve on a steam engine cylinder
* Bibcock, a small type of valve
* Sample cock, a small valve fitted in breweries and other process industries to check the product during manufacture
* Stopcock, a valve used to restrict or isolate the flow of a liquid or gas through a pipe
* Petcock, a small valve, primarily for draining liquid or releasing pressure from a vessel
* Ballcock, a mechanism for filling water tanks
* Emergency brake cock, a compressed air valve used to apply the air brakes on a train in an emergency

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http://en.wikipedia.org/wiki/Kingston_valve

A Kingston valve is a type of valve fitted in the bottom of a ship's fuel, water and ballast tanks. Named after its inventor John Kingston (1786-1847), an English engineer.[1]

The valve connects the tank to the sea and when open, allows sea water to enter the tank for the purposes of cleaning the tanks and to admit water ballast.