_descriptor.html#ab13befdd4bab5fd70ecfc2e98c1d069c">   22</a></span>&#160;        <span class="keywordtype">double</span> <a class="code" href="structsbt__descriptor.html#ab13befdd4bab5fd70ecfc2e98c1d069c">drho</a>; </div><div class="line"><a name="l00023"></a><span class="lineno"><a class="line" href="structsbt__descriptor.html#a4c71c1d68e6d76f404d3b9afd16b0cea">   23</a></span>&#160;        <span class="keywordtype">double</span> <a class="code" href="structsbt__descriptor.html#a4c71c1d68e6d76f404d3b9afd1