… and bridge-sections, towers, lattice masts, roofs, roofing frameworks, doors and windows and their frames and thresholds for doors, balustrades, pillars and …
Explanatory notes
… and bridge‑sections, towers, lattice masts, roofs, roofing frameworks, doors and windows and their frames and thresholds for doors, balustrades, pillars and … instead of iron or steel in the manufacture of structural frameworks, ships’ superstructures, bridges, sliding doors, …