The invention provides a reamer apparatus for a ground boring machine that is capable of restricting increase in drawing resistance when performing drawing of a buried pipe by using a reamer and of efficiently performing drawing operations of the buried pipe without degrading properties such as flexibility and rotatability. Thereby, the boundary between the molded part and the resin piece is disposed inside the groove without conspicuousness. Whether the second user is at the location is determined. The method includes a step of trying to set a call, a step of connecting an asynchronous connection-less, a step of connecting a synchronous connection-oriented when the ACL is connected, and a step of performing the voice telephone call when the SCO is connected. A self-healing networked computer system is also disclosed, comprising the diagnostic component and a remedial object adapted to perform one or more remedial actions according to the attribute. Also disclosed is a process for fabricating organic electroluminescent devices by using the transfer substrate.