11. Differential pressure can be measured by gauges containing two different Bourdon tubes, with connecting linkages.12. Differential pressure is measured between two segments of a venturi tube that have a different aperture.13. Also known as the Differential Pressure . 14. This is caused by a restriction within the motor and is termed the " differential pressure ". 15. The porosity in powder metal parts becomes a liability when the part must resist a differential pressure . 16. Dynamic pressure can be measured by taking the differential pressure between instruments parallel and perpendicular to the flow. 17. The LRI uses dynamic differential pressure and "'Angle of Attack "'to operate. 18. In this way, it averages the differential pressures encountered accounting for variations in flow across the section. 19. Also if the fit is wrong then the differential pressure may be either too high or too low. 20. He owns several patents, which include " Electromagnetic forming element " and " Differential pressure gauge ".