and the ???Modus:Function??? section of the homepage of Wilkhahn at <a href="http://www.wilkhahn.co.jp/products/working/modus/function.html).FIG.">http://www.wilkhahn.co.jp/products/working/modus/function.html).FIG.</a> 14 is a drawing showing the structure of a conventional chair.In FIG. 14, 113 is a base portion of a conventional chair.