The paper presents the results of theoretical and experimental investigations in the effect of a partial heat energy removal in the friction contact zone upon the disc brake coefficient of friction during braking. A fluid cooling system for the disc brake friction elements has been proposed based on a recuperative liquidpneumatic heat-exchange apparatus.

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The paper suggests a railway track diagnostic device adaptable to the conditions of uncontrolled acoustic interferences of man-caused origin propagating in the rail material by means of using the spectral analysis based upon the Fourier transformation, digital filtration and statistical signal processing. The device block diagram and its operation are considered.

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