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Application filed by Usines Gustave StaarfiledCriticalUsines Gustave Staar
Priority to BE581767ApriorityCriticalpatent/BE581767A/fr
Publication of BE581767ApublicationCriticalpatent/BE581767A/fr
BE581767A1959-08-181959-08-18Dispositif indiquant la présence de disques restant à jouer sur la colonne de contrôle d'un changeur de disques.
BE581767A
(fr)