Scientific, measuring, checking supervision apparatus and instruments, namely, laser distance meters, pressure measuring apparatus, spectrometers, reflectometers, installations for photolithographic structuring of a photoresist layer; Reflectors being parts or fittings for lasers, not for medical purposes; Products of quartz glass for use in the chemical, electronics and semiconductor industries and for laboratory purposes, namely, cuvettes, crucibles, bowls, beakers, bell jars, flanges, shut...