… towers, lattice masts, roofs, roofing frame-works, doors and windows and their frames and thresholds for doors, shutters, …
Explanatory notes
… towers, lattice masts, roofs, roofing frame‑works, doors and windows and their frames and thresholds for doors, … for reinforced or pre‑stressed concrete work. The heading does not cover : (a) Assembled sheet piling ( heading …