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G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
G01N9/00—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
G01N9/32—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by using flow properties of fluids, e.g. flow through tubes or apertures
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FR758228D1932-08-081933-07-11Dispositif pour déterminer automatiquement la densité ou la viscosité d'un gaz
ExpiredFR758228A
(fr)