Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field Subject Field/48
Is Reference of Photozellendetektor mit Strahlunterbrechung-de#Sense
Détecteur photo-électrique à faisceau interrompu-fr#Sense
Fotocelledetektor med afbrudt stråle-da#Sense
Interrupted beam photo-electric detector-en#Sense
Rivelatore a fotocellula a fascio interrotto-it#Sense