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・ Thermal profiling
・ Thermal quantum field theory
・ Thermal radiation
・ Thermal rearrangement of aromatic hydrocarbons
・ Thermal relief
・ Thermal reservoir
・ Thermal resistance
・ Thermal response test
・ Thermal rocket
・ Thermal runaway
・ Thermal scanning probe lithography
・ Thermal science
・ Thermal shift assay
・ Thermal shock
・ Thermal simulations for integrated circuits
Thermal sleeve
・ Thermal spraying
・ Thermal stability
・ Thermal subsidence
・ Thermal tails
・ Thermal time
・ Thermal time hypothesis
・ Thermal time scale
・ Thermal transfer
・ Thermal transfer printing
・ Thermal transmittance
・ Thermal transpiration
・ Thermal trauma
・ Thermal treatment
・ Thermal vacuum chamber


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Thermal sleeve : ウィキペディア英語版
Thermal sleeve

A thermal sleeve, or blanket, is a device around the length of a gun barrel of a large caliber gun, typically found on modern tanks. Its primary purpose is to provide a constant temperature to the gun barrel preventing distortions due to thermal expansion caused by the temperature differences around the barrel when firing.〔Tucker p. 360-361〕
Thermal sleeves were originally simply insulators. They would prevent ambient conditions such as bright sunlight or winds from heating or cooling one side of a barrel more than the other which would cause a thermal distortion (bending or drooping), reducing accuracy. More modern variants contain concentric inner and outer insulating sleeves with a gap in between. Versions have been created which are detachable from a given barrel so that they can be re-used with a replacement barrel. Proposals exist for types that have advanced external thermal and radar profiles, reducing their thermal and radar signatures making the barrel and thereby the tank harder to detect.〔US Patent (5400691 ), Rigid thermal sleeve for a gun barrel, Retrieved on 29 December 2008〕
One of the earliest guns to use a thermal sleeve was the Royal Ordnance L11 used on the Chieftain tank.
==References==


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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