The delegation of rights may be controlled in a number of manners. The e-proxy receives the SIP INVITE message from the IPv4 network. The jacket comprises a polymer material. The swimsuit converter holds the swimsuit rear panel together, and converts a conventional or bikini style swimsuit to a thong style, which is particularly suitable for sun bathing and sun tanning. The system then determines from the comparison whether the sensors in the computer system are operating properly. The NC circular table has an NC controller for performing a positional detection by an absolute type encoder and a backup battery for the encoder is provided in the NC circular table body.