Background. In microwave technology. of great interest is the creation of amplifiers and generators based on thin-layered longitudinal inhomogeneities in rectangular waveguides. which are an integral part of many functional devices in the microwave and EHF ranges. https://www.roneverhart.com/2003-2005-HONDA-ACCORD-2-4L-4-Cylinder-Engine-Upper-Intake-Manifold-OEM/