Instance of: http://www.w3.org/2004/02/skos/core#Concept
Subject Field unknown
Is Reference of Apertura angolare del catadiottro-it#Sense
Angular diameter of the reflex reflector-en#Sense
Kampinis šviesos atšvaito skersmuo-lt#Sense
Openingshoek van de retroflector-nl#Sense
Trastomhas uilleach an fhrithchaiteora athfhilltigh-ga#Sense
Apertura angular del catadióptrico-es#Sense
Oeffnungswinkel des Rueckstrahlers-de#Sense
Ouverture angulaire du catadioptre-fr#Sense
Refleksanordningens abningsvinkel-da#Sense
Abertura angular do refletor -pt#Sense
A fényvisszaverő nyílásszöge-hu#Sense
Γωνιακό άνοιγμα του αντανακλαστήρα-el#Sense