Nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signalling, checking (supervision), life-saving and teaching apparatus and instruments; laboratory apparatus for the treatment and handling and processing of samples, in particular liquid samples, namely, apparatus for dosing, transvasing, mixing, concentrating, homogenising and filtering of substances and reagents; laboratory apparatus, namely, disposable laboratory articles, cuvettes, pipettes and pipette tips...