… viscosity, porosity, expansion, surface tension or the like; instruments and apparatus for measuring or checking quantities of heat, sound or light (including exposure meters); microtomes. …
Explanatory notes
… viscosity, porosity, expansion, surface tension or the like; instruments and apparatus for measuring or checking quantities of heat, sound or light (including exposure meters); microtomes. 9027.10 ‑ Gas … are instruments for determining the refractive index of liquids or solids (one of the most important constants in …