DIFF Subgroup
F23L 17/08 with coaxial cones or louvres
Introduced: September 1968
Full Title
Inducing draught; Tops for chimneys or ventilating shafts; Terminals for flues > Tops for chimneys or ventilating shafts; Terminals for flues > with coaxial cones or louvres
No child classifications to compare. This is a leaf node in both IPC and CPC.