Dk 021:2015 – 31220000-4 – Elements Of Electrical Circuits (Bus Zero E.Bs.Stand.1.12 – 31224800-0; Mounting Box E.Db.Pro.85.85.50, Mounting Box 900100 D60 Brick/Concrete – 31224700-9 ; Socket Double With Grounding Contact, White Deriy, Socket 1 With Grounding From Demet - 31224100-3) (EXPIRED)