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Blanding indeholdende oleofil grafit og et metal til brug somsmoeremiddel eller bestanddel af en smoeremiddelblanding samt fremgangsmaade til fremstilling af blandingen
Apparat til ved røntgenspektrografi af bestemme koncentrationen af et bestemt grundstof i de faste partikler i en blanding af faste partikler og væske.