A linear friction welding head apparatus for dual axis forging, the apparatus including three sets of orthogonal actuators for providing X-, Y-, and Z-planes of apparatus movement for providing Y-axis oscillation, a first forge load along a first forge axis, and a second forge load along a second forge axis. A communication terminal device calculates secret key information k\u2032 which is exclusive OR of key information k of the registration biological information and masked value c\u2032 which is randomly selected from a predetermined error correction code group, and calculates verified information c\u2032\u2033 which is exclusive OR of sent information c\u2033 and value c\u2032. The spoke nipple includes a cupped shaped base portion and a stem portion. According to another aspect, a printing device is configured to collect statistics that indicate how many times one or more particular help instructions or particular recommended actions have been selected or displayed. There is provided a depressing mechanism for turning each of the divided segments in an upward and outward direction at the time of pressing at the collar.