A device for the cleaning and maintenance of the cooling fins of a heat exchanger of an air conditioner unit includes a pistol-grip water nozzle having a water inlet providing a water pressure of between about 40 to about 80 pounds per square inch, the nozzle having a threaded outlet. The full adder uses minimum sized XORXNOR cells. A light beam is emitted from a light source, deflected by a polygon mirror, and is guided below the laser-control circuit board by various optical elements including a condenser lens, thereby being finally detected by the synchronization detection element. One example of this would be the measurement of human feet. Adjacent pixels are separated by an element isolation portion formed of a diffusion layer and an insulating layer thereon, and the insulating layer of the element isolation portion is formed in a position equal to or shallower than the position of a pn junction on the side of an accumulation layer of a photoelectric conversion portion 38 constituting a pixel. To validate resultant carbon fixation and sequestration, a vertical spar buoy is provided.