Projection orthographique

<BODY bgcolor="#ffffff" text="#000000" link="#9944EE" vlink="#0000ff" alink="#00ff00"> <P> Sorry, this requires a browser that supports frames! <BR> Try <A HREF="node12_ct.html">node12_ct.html</A> instead.</P> <HR> <ADDRESS> <I>Edmond Boyer <BR> 2001-03-07</I> </ADDRESS>