… Instruments and apparatus for measuring or checking the flow, level, pressure or other variables of liquids or gases (for example, flow meters, level gauges, manometers, …
Explanatory notes
… 90.26 ‑ Instruments and apparatus for measuring or checking the flow, level, pressure or other … canals (hydroelectric works, irrigation systems, etc.). To ascertain the content of a gasometer, the level of the …