21 Glass, unworked or semi-worked, except building glass; unworked or semi-worked radiation shield glass, except building glass; unworked or semi-worked crystallized glass, except building glass; unworked or semi-worked crystallized glass for use in the manufacture of top plates of cooking apparatus and installations for industrial and household purposes; heat-resistant glass, unworked or semi-worked, except building glass; luminous glass, not for building; unworked or semi-worked strengthen glass, except building glass; unworked or semi-worked glass for use in the manufacture of chemical laboratory glassware; unworked or semi-worked glass for use in the manufacture of parts and fittings of laboratory apparatus and instruments; opal glass, not for building; unworked or semi-worked glass for use in the manufacture of parts and fittings of telecommunication machines and apparatus, optical communication machines and apparatus, electronic machines and apparatus, lighting apparatus; glass, unworked or semi-worked, except building glass, namely, guard glass for image sensors, laser diodes, emitting laser diode, photodiodes and other diodes; sealing glass tubes not for scientific purposes, unworked or semi-worked, including those for infrared absorption; glass tubes, unworked or semi-worked, for ampoules for drug injections, namely, glass ampoules for medication sold empty; glass, unworked or semi-worked, namely, glass substrates, glass tubes, glass for exhaust tubes, and sealing glass, all for the manufacture of liquid crystal displays, organic electroluminescence displays, inorganic electroluminescence displays, flat-panel displays and other panel displays and not for scientific purposes; glass tubes not for scientific purposes, unworked or semi-worked, used for connection of optical fibers; unworked or semi-worked glass for use in the manufacture of parts and fittings of medical machines and apparatus; unworked or semi-worked glass for use in the manufacture of glass parts of fusing furnace, melting furnaces, calcining kilns and other industrial furnaces; unworked or semi-worked glass for use in the manufacture of parts of nuclear reactors; glass for vehicle lamps semi-finished product; unfinished glass for vehicle windows; glass tubes not for scientific purposes for automobile lamps in the nature of a semi-finished product; unworked or semi-worked glass for use in the manufacture of cooking apparatus and installations for industrial and household purposes; unworked or semi-worked glass for use in the manufacture of parts or fittings of cooking apparatus and installations for industrial and household purposes; unworked or semi-worked glass for use in the manufacture of furniture; unworked or semi-worked glass for use in the manufacture of single-leaf screens; unworked or semi-worked glass for use in the manufacture of partitions; glass, unworked or semi-worked, not for building, used for forming dielectric layers on electric parts and electronic parts, forming ribs for pixels located inside of a display panel, forming coated layers, binding metallic powder, binding ceramic derivatives, coating or hermetic sealing; glass, unworked or semi-worked, except building glass for use inside vacuum bottles; glass, unworked or semi-worked, not for building, for forming coated layers of printed boards, circuit boards, semiconductors, semiconductor devices and other electronic components; glass, unworked or semi-worked, not for building, for use in the manufacture of circuit boards; glass, unworked or semi-worked, except building glass, in paste form, for industrial purposes; glass, unworked or semi-worked, except building glass, in powder form, for industrial purposes; glass, namely, glass ceramic, unworked or semi-worked, not for building; fiberglass other than for insulation or textile use; fiberglass thread and yarn, not for textile use; industrial packaging containers of glass or porcelain, in particular chemical containers of glass; glass stoppers for industrial packaging containers; glass covers in the nature of lids and lids for industrial packaging containers; cooking pots and pans non-electric, of glass; lids of cooking pots and pans, of glass; tableware, other than knives, forks and spoons, namely, glass ovenware; glass trays for household purposes for microwave ovens; glass ovenware; glass ceramic ovenware; vacuum bottles; glass replacement and structural parts of vacuum bottles; processed glass, not for building, namely, strengthened glass; processed glass, not for building, namely, crystallized glass; unworked or semi-worked conduction glass, except building glass; unworked or semi-worked heat-resistant glass, except building glass; unworked or semi-worked ultraviolet-ray transmitting glass, except building glass; unworked or semi-worked infrared-ray absorbing glass, except building glass