A lock-up device includes a piston, a clutch part, a first hydraulic chamber, a second hydraulic chamber, a first hydraulic port and a second hydraulic port. The bag includes the bag body carried on the back of the animal, two first belt-like assemblies attached to an outer surface of the bag body and crossing each other on the belly of the animal to form an X shape, a second belt-like assembly attached to the first belt-like assemblies and forming a U shape around a neck of the animal. An isolation trench divides the semiconductor layer into a first region and a remaining region, and divides the array of light-emitting elements into segments disposed alternately in these two regions, each segment preferably including one or two light-emitting elements. The fallback detectors have controller logic which detects the presence of a ringing signal on the telephone line and the failure of the PBX to respond to the ringing signal. A radio capability selecting section selects radio capability values from the radio capability internal list, and reports the radio capability report list to the communication network to be connected. If the operation is not a sort operation, then at least part of a result of the operation is stored on the disk space according to the level of redundancy specified for the disk group.