A Si-killed steel wire rod for obtaining a spring excellent in fatigue properties and a spring excellent in fatigue properties obtained from such steel wire rod are provided. A labial force dispersal shield and molar framing braces extend downwardly from the plate at incisor and lingual zones of the plate. The recipient, a recipient-message-type, and the source-message-type are determined and, responsive thereto, adaptors are selected for changing the message from the source-message-type to the recipient-message-type.