Norm-Entwurf
PR NF P51-202-1-1
; PR NF DTU 24.2 P1-1
PR NF P51-202-1-1
; PR NF DTU 24.2 P1-1
Building works . Flue duct work . Part 1.1 : Technical specifications.
Titel (englisch)
Building works . Flue duct work . Part 1.1 : Technical specifications.