Blocks for construction made of sand, gravel, crushed stone, asphalt, bitumen, cement, gypsum, plaster, concrete, and marble; shuttering, not of metal, for concrete, gypsum, clay, potters' clay, stone, marble, wood; poles not of metal for power lines; natural and synthetic coatings in the form of panels and sheets, being building materials, bitumen cardboard coatings for roofing; bitumen coating for roofing; doors and windows of wood and synthetic materials; traffic signs not of metal, non-lu...