through a restricted passage, e.g. tube, aperture

Full Title

Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties > by measuring flow of the material > through a restricted passage, e.g. tube, aperture

Child Classifications

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• G01N 11/06 by timing the outflow of a known quantity
• G01N 11/08 by measuring pressure required to produce a known flow