An ice cliff forming the seaward margin of a glacier which is not afloat. An ice wall is aground with the underlying land at or below sea level.
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HEAT EXCHANGER
A device which transfers heat through a conducting wall from one fluid to another.
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THERMAL INSULATION
Material which is a poor conductor of heat; used to retard or slow down flow of heat through wall or partition.
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REACTION TURBINE
A reaction turbine utilizes a jet of steam that flows from a nozzle on the rotor. Actually, the steam is directed into the moving blades by fixed blades designed to expand the steam. The result is a small increase in velocity over that of the moving blades. These blades form a wall of moving nozzles that further expand the steam. The steam flow is partially reversed by the moving blades, producing a reaction on the blades. Since the pressure drop is small across each row of nozzles (blades), the speed is comparatively low. Therefore, more rows of moving blades are needed than in an impulse turbine.
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CONSOLIDATED RIDGE
A ridge (a line or wall of ice forced up by pressure) in which the base has frozen together.
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CUMULONIMBUS
An exceptionally dense cloud of great vertical development, occurring either as an isolated cloud or one of a line or wall of clouds with separated upper portions. These clouds appear as mountains or huge towers, at least a part of the upper portions of which are usually smooth, fibrous, striated, and almost flattened. This part often spreads out in the form of an anvil or plume. Under the base of cumulonimbus, which often is very dark, there frequently exists virga, precipitation, and low, ragged clouds, either merged with it or not. Its precipitation is often heavy and always of a showery nature. The usual occurrence of lightning and thunder within or from this cloud leads to its being popularly called THUNDERCLOUD and THUNDERHEAD. The latter term usually refers to only the upper portion of the cloud.
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BULKHEAD
Vertical partition walls which separates the interior of a ship into compartments or rooms
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BAFFLE
A plate or wall for deflecting gases or liquids.
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BRIDGEWALL
A wall in the furnace over which the products of combustion pass.
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BULGE
A local distortion or swelling outward caused by internal pressure on a tube wall or boiler shell due to overheating. Also applied to similar distortion of a cylindrical furnace due to external pressure when overheated, provided the distortion is of a degree that can be driven back.
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BUCKSTAY
A structural member placed against a furnace or boiler wall to limit the motion of the wall against furnace pressure.
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