A solder bump structure and method for forming the same. The passivation film has a quantity of ion projection than that of the intermediate film. In a state in which the robot stands normally on the floor F with the knee joints 14 of the leg members 2 bent forward slightly, the center of gravity C of the entire robot including the electrical storage device 19 exists substantially directly above the knee joints 14 as seen from one side of the robot. The threads include at least one load instruction that causes the instruction execution circuitry to retrieve data from the data cache. Additionally, the powder paint color changer manifold includes a replaceable insert of impact fusion resistant material which defines the surface of the manifold’s interior cavity. The site profile can be manually or automatically constructed.