BRYAN DONKIN

Gas regulators [ ; non-return valves for heating installations; filters and filtering devices for air and gas conditioning, namely, gas filters; gas pressure regulators; gas pressure regulating stations; regulating accessories for gas apparatus, namely, gas regulator noise reduction devices, namely, chamber of springs, ceramic inserts, wire mesh, and expanding outlet ducts; governors as a component part of gas regulators; motors as a component part of gas regulators ]