Scientific, weighing and measuring apparatus and instruments, namely, filters used in scientific apparatus for the detection of toxins, glassware for scientific experiments in laboratories, spectrography columns, spectrometers, spectrophotometers, electronic analysers for testing for the presence of contaminants and pollutants; scientific apparatus for use in analytical tests, other than medical, namely, spectrography columns, spectrometers, spectrophotometers, electronic analysers for testin...