FIELD: testing equipment. SUBSTANCE: given plant has bed frame and two material grippers. First gripper is coupled to loading mechanism and second gripper is linked to mechanism maintaining constant load. Additional grippers are uniaxially installed between first gripper catching sample and lever loading mechanism. One additional gripper is coupled to lever loading mechanism. Second additional gripper is coupled to first sample gripper and cross-piece is put between them. Dynamometer is installed between additional grippers. Insert-link presenting additional tested sample is also placed between additional grippers. EFFECT: increased accuracy of loading of sample by specified value. 3 cl, 1 dwg
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