Embodiments of golf coupling mechanisms are presented herein. The solder resist layer has a plurality of solder resist openings therein. Forwarding node transmits to policy management apparatus identifier of host connected to own forwarding node and identifier of own forwarding node. The core member is formed of a different material than the socket terminal body, and is sized and shaped to obstruct the hole. The gear door can be opened in response to receiving the first signal. The inventive device is particularly suitable for treating an elongated area such as vein portions enveloping a pathological valve.