Insertion piece portions 25, each having a retaining portion 25a formed at a distal end thereof, is formed on that portion of a cover openingclosing portion 17 disposed near to a hinge portion 17. Project information associated with a first project is received at an interface of a computer database environment. The first radiating body and the second radiating body are symmetrical to each other with respect to the connecting body. First and second arbitration circuits are coupled respectively to the first and second stages of the multi-stage pipelined network, with each arbitration circuit configured to receive requests for access to the resource from at least one initiator and forward such requests to the shared resource. The shaft extending through the hollow bore of the ferrule from the second end of the ferrule to securely engage with the head.