… Optical, photographic, cinematographic, measuring, checking, …
Explanatory notes
… Chapter 90 Optical, photographic, cinematographic, measuring, checking, … whether or not their operation depends on an electrical phenomenon which varies according to the factor to be … to more complex instruments used in astronomy, photography, cinematography or for microscopic observation. …Legal note
… whether or not their operation depends on an electrical phenomenon which varies according to the factor to be … quantities the operation of which depends on an electrical phenomenon varying according to the factor to be controlled, …