9 Pressure regulators for pressure control and/or pressure monitoring in chemical, petrochemical, medical, aviation, and industrial installations; air and gas pressure regulators for pressure control and/or pressure monitoring; pressure relays in the nature of a pressure control for equipment used in the chemical, petrochemical, medical, aviation, and industrial industries; pressure relays in the nature of pressure measuring apparatus. servo pressure controllers in the nature of pressure control for equipment used in the chemical, petrochemical, medical, aviation, and industrial industries; automatic pressure control machines and instruments, electronic valves for controlling gas or fluids, pneumatic control valves for use in automated production machinery ; electrical transducers, electropneumatic transducers, analog pressure transducers in the nature of pressure control for equipment used in the chemical, petrochemical, medical, aviation, and industrial industries; pressure transducers and transmitters that convert hydraulic or pneumatic pressure into analog electrical signals for monitoring and controlling hydraulic or pneumatic systems; analog pressure regulators for pressure control for equipment used in the chemical, petrochemical, medical, aviation, and industrial industries; diaphragm air cylinders in the nature of pressure and tension applications for critical OEM and industrial applications