almaden

Optical glass; optical condensers; semi-conductors; automatic devices for power station; solar batteries; signal lanterns; lamp boxes; polycrystalline silicon; anticathode of electron tubes; integrated circuits. Building glass; insulating glass [building]; coated glass; coatings [building materials]; building materials, not of metal; roofing, not of metal, incorporating solar cells; constructive materials for glass use (not including sanitary equipment); structure of glass fiber reinforced plastics for construction; lighting slabs; refractory construction materials, not of metal. Crystal [glassware]; plate glass [raw material]; glass, unworked or semi-worked, except building glass; glass incorporating fine electrical conductors; fiberglass other than for insulation or textile use; toughened glass; semi-finished glass tubes or pipes; heat-insulated containers; drinking vessels; utensils for household purposes.