… Taps, cocks, valves and similar appliances for pipes, boiler …
Explanatory notes
… 84.81 ‑ Taps, cocks, valves and similar appliances for pipes, boiler … such devices designed to regulate the pressure or the flow velocity of a liquid or a gas. The appliances regulate the … a key, wheel, press button, etc.), or by a motor, solenoid, clock movement, etc., or by an automatic device such as a …