Structures (excluding prefabricated buildings of heading 94.06) and parts of structures (for example, bridges and bridge-sections, lock-gates, towers, lattice masts, roofs, roofing frame-works, doors and windows and their frames and 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 structures, of iron or steel

7308.30 — Doors, windows and their frames and thresholds for doors:

Cửa ra vào, cửa sổ và các loại khung cửa và ngưỡng cửa ra vào: