Dynamic web page generation is optimized by reducing the processing overhead required to parse the web page HTML code for tokens and insert dynamic content. The system allows for the easy navigation of a primary source of information, as well as the navigation of secondary information related to the primary information source. The drive blades slidably mounted on a slanted surface of a drive drum on the input shaft and move closer to and away from the stater blades when laterally translated. The lengths of each connecting tube are selected such that pressure waves of the compressed gases compete with each other at the joining point for a time period encompassing one rotation of the crankpin, whereby a pulsation resulting from gas flow discharged in concentration is decreased.