… and parts of structures (for example, bridges and bridge-sections, lock-gates, towers, lattice masts, roofs, roofing … thresholds for doors, shutters, balustrades, pillars and columns), of iron or steel; plates, rods, angles, shapes, sections, tubes and the like, prepared for use in …
Explanatory notes
… and parts of structures (for example, bridges and bridge‑sections, lock‑gates, towers, lattice masts, roofs, roofing … thresholds for doors, shutters, balustrades, pillars and columns), of iron or steel; plates, rods, angles, shapes, … have protuberances with tapped holes in which screws are inserted, at the time of assembly, to fix the clamps to the …