The present invention discloses a method for realizing presence service. The box includes doors to either side and neither the box nor the doors extend above the top of the sidewalls of the truck bed. The preform holds the shape of the implantable component during impaction of bone replacement material to fill defects formed in the bone via disease, congenital defect, or trauma. The compactor may be conveniently installed in compartments, which are fixed or movable on wheels, such as a trolley, so as to allow easy displacement within the mode of transportation and insertion within the appropriate working spaces. The first and second electrodes are separately disposed on the epitaxial layer structure, and the epitaxial layer structure has a root-means-square roughness less than about 3 at a surface whereon the first electrode is formed.