A pressure washer system includes an internal combustion engine and a water pump. The load-bearing fork members can be mounted on the first and second beams. A CPU executes an AF process for adjusting a distance from the focus lens to the imaging surface to a distance corresponding to a focal point, based on the object scene image generated by the image sensor. The position of the ground plane relative to the antenna is also varied between embodiments. Owing to the intersection of two doped regions, there are good electrical paths between the electrical elements on the trench side-walls and the previously P-type doped portions on the wafer surface.