… Oscilloscopes, spectrum analysers and other instruments and apparatus for measuring …
Explanatory notes
… 90.30 ‑ Oscilloscopes, spectrum analysers and other instruments and apparatus for measuring … converters, switches, etc. Measuring bridges are often named after their inventor (Wheatstone, Thomson, Anderson, … Sauty, Schering, Kohlrausch, Wien, etc.); others have names indicating the grouping system of the units of …