A hand-held game machine includes a horizontally-long rectangular housing, and the housing is covered with a cover almost entirely. The test device is in the form of a disk with a base portion supported within the container and an indicator arm. The welding robot 1 includes a servo gun 5 provided at a front end of a multi-joint arm 2, in which a pair of electrode tips for the spot welding are installed, and a control unit 3 for controlling a servo motor 6 of the servo gun in a welding process or a grinding process of the electrode tips. The operator can create the links manually or the program can identify features of the object and then maintain the link when the dynamic object changes in size or shape. The spacer is mounted between the upper touch layer of the upper module and the lower touch layer of the lower module to space apart the upper touch layer of the upper module and the lower touch layer of the lower module.