Disclosed herein are methods, structures, and devices for optical communications systems operating through turbulent media. The fitting comprises a hollow, tubular, electrically conductive housing including a fastening arrangement on the leading end to allow snap-in engagement to a panel. The downstream-side end of the catch tray and the upstream-side end of the cover are configured to mutually overlap when viewed in a second direction perpendicular to the first direction and a vertical direction. A robot mounts its associated tool arm with a docking station. As a result, the method of the present invention reduces the cost and complexity associated with the fabrication of a semiconductor circuit that includes a depletion-mode transistor. The adhesive layer contains 100 parts by mass of a acrylate ester copolymer, 1 to 10 parts by mass of a cross-linker, 0.