… for physical or chemical analysis (for example, polarimeters, refractometers, spectrometers, gas or smoke analysis apparatus); … or checking viscosity, porosity, expansion, surface tension or the like; instruments and apparatus for measuring …
Explanatory notes
… or checking viscosity, porosity, expansion, surface tension or the like; instruments and apparatus for measuring … and reading eyepieces, and a device for controlling the temperature (since this greatly affects the refractive … They are widely used, particularly in food industries (for testing oils, butter and other fatty substances, analysing …