A solar photovoltaic module containing a housing that supports an array of photovoltaic cells and corresponding light guides. A keyboard configuration may be determined. The method is conducive to reducing product size for miniaturization, is capable of performing a bonding process without wafer deformation or damage, and increases freedom in wafer material selection. The computation of the intra-candidate dependent feature score can be based on dependencies between different terms in the alteration candidate. The lower surface of the sheet is released downward by the opening. The valve is movable to contact the exit valve seat and prevent fluid that is flowing from the cylinder to the reservoir from flowing through the inlet channel.