… bridges and bridge-sections, lock-gates, towers, lattice masts, roofs, roofing frame-works, doors and windows and …
Explanatory notes
… bridges and bridge‑sections, lock‑gates, towers, lattice masts, roofs, roofing frame‑works, doors and windows and … they generally remain in that position. They are usually made up from bars, rods, tubes, angles, shapes, sections, … and similar equipment; sluice‑gates, piers, jetties and marine moles; lighthouse superstructures; masts, gangways, …