FIELD: testing equipment. SUBSTANCE: gear for strength testing makes it possible to obtain characteristics of long-term strength of heat-proof materials under high temperatures in flow of combustion products of fuel carrying corrosion-risky impurities. Specimen of tested material comes in the form of ring into which another ring made of material with higher coefficient of linear expansion is pressed. EFFECT: given gear makes it feasible to obtain characteristics of long-term strength under conditions maximally approximated to operational conditions. 1 cl
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