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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
G01N9/10—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by observing bodies wholly or partially immersed in fluid materials
G01N9/12—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by observing bodies wholly or partially immersed in fluid materials by observing the depth of immersion of the bodies, e.g. hydrometers
G01N9/16—Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity by observing bodies wholly or partially immersed in fluid materials by observing the depth of immersion of the bodies, e.g. hydrometers the body being pivoted
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FR923121D1946-01-161946-01-16Procédé destiné à donner l'alarme en cas de fuite de gaz et appareil pour la mise en oeuvre de ce procédé
ExpiredFR923121A
(fr)
Procédé pour l'amélioration du fonctionnement des appareils frigorifiques à absorption et gaz inerte et appareil pour la mise en oeuvre de ce procédé ou procédé similaire