Classification opinions
… float valve and a hand-operated flow regulating device. Adoption : 1962 … 2. Pneumatic actuator valve, for … balance spring, whether or not fitted with a positioner. Adoption : 1962 … 3. Valve, not fitted with a press-button, … (v) A housing, of plastics; (vi) A steel spring; (vii) A diptube, of plastics. The article opens and closes a …