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Publication of NL85449CpublicationCriticalpatent/NL85449C/xx
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
G01N9/002—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity using variation of the resonant frequency of an element vibrating in contact with the material submitted to analysis