FIELD: measurement technology. SUBSTANCE: workpiece is freely installed with the surface to be inspected on a nozzle, working medium is delivered through the nozzle until free suspension of the workpiece in the flow is attained, and information parameter is measured; the value of working medium excess pressure at the instant of its stepped drop or the value of working medium volumetric discharge at the instant of its stepped rise is used as information parameter. EFFECT: enhanced inspection efficiency. 1 dwg
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