Surface covering components that include a topcoat layer with different gloss levels in various regions on the top coat layer, and methods of manufacturing such surface covering components, are disclosed. The content distribution system includes a content distribution apparatus distributing content formed of digital information, and a plurality of users present within the pseudo closed space use respective portable content reception apparatuses to receive and reproduce the content. And the apparatus for pre-activating a polymer electrolyte fuel cell is used to monitor physical damage of the membrane electrode assembly based on the change of degree of vacuum at a fuel electrode side and an air electrode side using, thereby detecting the leaking membrane electrode assembly in advance. The base of the transistor is, via a diode, connected to a further node in the series arrangement of batteries, and a switching element is provided to address the transistor.