… lock-gates, towers, lattice masts, roofs, roofing frame-works, doors and windows and their frames and thresholds for doors, shutters, balustrades, …
Explanatory notes
… lock‑gates, towers, lattice masts, roofs, roofing frame‑works, doors and windows and their frames and thresholds for doors, shutters, balustrades, … generally remain in that position. They are usually made up from bars, rods, tubes, angles, shapes, sections, sheets, …