CPC Subgroup
F21V 11/10 of iris type
Full Title
Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 (characterised by cooling arrangements F21V29/502) > using diaphragms containing one or more apertures > of iris type
F21V 11/10 Screens not covered by groups F21V1/00, F21V3/00, F21V7/00 or F21V9/00 (characterised by cooling arrangements F21V29/502) > using diaphragms containing one or more apertures > of iris type