An expansion card socket used to fix an expansion card includes a main body and a latching member. In the preferred embodiment, Applicants’ MEWT incorporates advanced flow mixing technology, single and multi-stage ejector technology, aircraft and propulsion aerodynamics and noise abatement technologies in a unique manner to fluid-dynamically improve the operational effectiveness and efficiency of wind turbines, so that its operating efficiency routinely exceeds the Betz limit. One or more credentials is provided to a second gatekeeper of a second network. The rings and connected graft may be positioned in the body passage using an applicator which selectively permits expansion andor in some embodiments contraction of the annular ring in position within a body passage. The lateral ribs are slidably inserted in the guide channels to integrally connect the lock bolts with the core shaft.