FIELD: construction.
SUBSTANCE: invention relates to production of building structures. Device consists of device base, punch, support, pressure screw, force synchronizer, foot, clamp from two parts, to which force synchronizer is connected, wherein the support has a rectangular-shaped opening, the dimensions of which correspond to dimensions of the chipped portion of the control sample, as a=1.1c; b=1.1d, where a and b are the hole length and width; c and d are the length and width of the chipped portion of the control sample, wherein the contact line of the male die surface with the chipped portion of the reference sample is made as a brachistochrone by the cycloid.
EFFECT: providing normalized accuracy of measurements during long-term operation.
1 cl, 3 dwg
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