Electric valve actuators; Control valves for regulating the flow of gases and liquids; Automatic valves for controlling the flow of gases and liquids in pipelines; Electronic valves for controlling gas or fluids; Valve position indicators; Switch boxes; Electric junction boxes; Electric distribution boxes; Pressure indicators for valves; Pressure indicator plugs for valves; Flowmeters for valves; Electric valves for controlling gas or fluids; Electronic apparatus for measuring the pressure of...