9 precision and analytical electronic scales, scale indicators and accessories for scales, namely data-read-off-indicators, printers, input-key-board panels, programs modules, instruments usable in combination with scales for the gravimetric determination of the density of liquids and solids, weights, support structure for scales, electric drying attachments for precision scales, trays for scales; physical-chemical and electronic measuring, controlling and monitoring units for use in diagnostic procedures, namely peristaltic pumps, vacuum pumps, impellertype pumps, pressure pumps, collectors for sampling liquids or gas for the determination of aerosols, germs and microorganisms; magnetic agitators; electrophoresis units; dissolution and absorption simulators; immunological detection apparatus for detection of proteins, filters used in diagnostic test units for use in laboratories for the determination of bacteria, germs, aerosols and proteins contained in fluids and gases; laboratory blood filters; laboratory filters for sterile aeration of medical containers and hose systems therefor; laboratory filters for sterile filtration of infusion solutions; radio chemical testing units for biological samples; diffusion cells for the freeing of effective substances in ointments; filter for the production of albumen-free filtrates for the enrichment of enzymes; filter holder; syringe for laboratory use; laboratory forceps; laboratory inoculating loops for use with petri dishes, and petri dishes, haemodialysis and haemofiltration machines for use on a patient; flow meter for measuring infusion and outflow to and from patient