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Вітчизняна й зарубіжна історіографія про життя й творчість В.В.Зеньковського
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2023
This work is devoted the researching of factors affecting the fatigue failure of drill pipes of strength class S and G. The research set the following aims: 1. Analysis of the operating conditions affecting the fatigue of the drill pipe. 2. Investigation of the effect of surface roughness on the fatigue life of the drill pipe. 3. Study of the effect of
openaire +1 more source
This work is devoted the researching of factors affecting the fatigue failure of drill pipes of strength class S and G. The research set the following aims: 1. Analysis of the operating conditions affecting the fatigue of the drill pipe. 2. Investigation of the effect of surface roughness on the fatigue life of the drill pipe. 3. Study of the effect of
openaire +1 more source

