Chemical products used in industry and science; inorganic elements and compounds in the form of hyperpure crystals; doped and undoped polycrystalline and monocrystalline inorganic semiconductor material, particularly in the form of crystals, granules and powders, in sawed, lapped, polished, etched and coated form; doped and undoped polycrystalline and monocrystalline inorganic semiconductor material, particularly in the form of rods, tubes, plates, sheets (wafers) and moulded bodies, in sawed...