9 Automatic control valves and liquid level controllers; pneumatic and electric liquid level switches; automatic pressure control machines; temperature controllers for monitoring, controlling, and switching hydraulic or pneumatic systems; pressure relief valves for rail cars and fixed tanks; site flow indicators; pressure isolation rings; level indicators, level switches and level gauges; vacuum breaker, namely, a pressure relief valve for rail cars and fixed tanks; electronic controls used in liquid handling, liquid handling equipment, and vapor recovery equipment; electric adaptors and plugs; automatic valves; automatic gasoline dispensing nozzles not being parts of engines or machines and parts therefor, namely, swivels and breakaways; industrial control valves and electric actuators therefor for use in controlling discharge of materials from truck trailer tanks; automatic valves and control valves for regulating the flow of gases and liquids; automatic liquid level gauges, liquid level controls and liquid level alarms, all for tanks cars, trucks, barges and stationary and intermodal tanks; electronic measuring, reference and calibration apparatus and instruments for use in sensing and measuring pressure and temperature, namely, quartz pressure transducers and accessories, namely, interfaces for transducers, isolator modules, sealing cones, resonators, and temperature sensor crystals; computer monitors and flat panel display screens; electronic components for industrial machinery, namely, indicators for use in monitoring load capacity of industrial machinery; electronic capacity indicators for industrial machinery and the percentage of that capacity being used; machine operator aids and warning systems primarily comprised of emergency warning lights, electronic warning bells, mounted video display monitors; electrical, electronic, and radio-controlled switches, sensors and computerized controls for crane systems; electrical, electronic, and radio-controlled devices for signaling, monitoring and metering for crane systems, namely, load cells, angle indicators, angle transmitters, load indicators, display panels, liquid crystal displays, tensiometers, rotation indicators, anti two-block systems consisting of sensors, transmitters, receivers, alarms, motion cut relays, motion cut valves and switches, anti two-block alarms, radio signal receivers, boom head transmitting radios, motion cut valves, and electrical, electronic, and radio-operated alarms