FIELD: measuring instruments. SUBSTANCE: method comprises inserting measuring rollers into openings to be tested with a spaced relation, rolling the surfaces of the openings by the rollers, measuring extremum deviations of surfaces of the measuring rollers from the nominal common axis of the openings at base lengths by which one can judge about the misalignment of the openings and deviation of the axes of the openings from the common axis. EFFECT: improved accuracy of measurements. 2 cl, 1 dwg
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