FIELD: conducting tests for strength. SUBSTANCE: test set has wheels 11 and 12, slide blocks 6 and 7, retainers 8 and 9, drive 13, pusher 5, spring 14 and grips 2 and 3 for specimen 4. Frequency is changed step-by-step through changing-over retainers 8 and 9. Test set may be used for testing the specimens of various materials. EFFECT: possibility of conducting the tests at step-by- step change of load and frequency of loading. 1 dwg
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