Scientific, nautical, surveying, photographic, cinematographic, optical, weighing, measuring, signaling, checking (supervision), life-saving and teaching apparatus and instruments; laboratory apparatus for the treatment and processing of samples, in particular liquid samples, namely apparatus for dosing, decanting, mixing, tempering, concentrating, homogenising and filtering of substances and reagents; laboratory apparatus, especially disposable laboratory articles, cuvettes, pipettes, pipett...