Inspection can occur during or after the manufacturing process.
The image illustrates a portion of the transmission's hydraulic circuitry and its land seal surfaces. The land seal surfaces mate with the transmission body and must be free of defects that would allow pressurized hydraulic oil to leak. A highly compressed image of the manifold land seal surface of a typical part is shown below. Seal Surface Small defects that could readily escape notice by human inspectors were readily detected on uncompressed images. Each of three example images shown below has been cropped from a full image of the part - as shown above.