FIELD: measurement technology. SUBSTANCE: proposed device contains stops 1 secured on flexible members 2 and made in form of semi0clamps with projections accommodating slots for fitting at least one elastic member 3. Stops 1, together with elastic member 3, form common module. Elastic member 3 is made of material whose rigidity exceeds rigidly of flexible member 2. Steels with high modulus of elongation are used for making elastic member 3. EFFECT: improved accuracy of measurements. 4 cl, 2 dwg
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